added validation for sales return and purchase return
added validation for sales return and purchase return

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APP,ThiagoGarciaAlves/erpnext,Tejal011089/trufil-erpnext,hatwar/focal-erpnext,Tejal011089/med2-app,fuhongliang/erpnext,ThiagoGarciaAlves/erpnext,geekroot/erpnext,gangadhar-kadam/powapp,Tejal011089/digitales_erpnext,indictranstech/focal-erpnext,suyashphadtare/vestasi-erp-jan-end,4commerce-technologies-AG/erpnext,suyashphadtare/sajil-erp,gsnbng/erpnext,indictranstech/buyback-erp,indictranstech/biggift-erpnext,dieface/erpnext,Tejal011089/huntercamp_erpnext,Drooids/erpnext,hernad/erpnext,saurabh6790/med_new_app,SPKian/Testing2,hatwar/Das_erpnext,Tejal011089/Medsyn2_app,SPKian/Testing2,rohitwaghchaure/GenieManager-erpnext,Tejal011089/osmosis_erpnext,suyashphadtare/vestasi-erp-1,saurabh6790/trufil_app,hatwar/focal-erpnext,saurabh6790/ON-RISAPP,shft117/SteckerApp,shft117/SteckerApp,gangadhar-kadam/verve_test_erp,mbauskar/phrerp,Tejal011089/trufil-erpnext,saurabh6790/medapp,rohitwaghchaure/New_Theme_Erp,rohitwaghchaure/New_Theme_Erp,gangadhar-kadam/verve-erp,ThiagoGarciaAlves/erpnext,suyashphadtare/sajil-final-erp,mahabuber/erpnext,indictranstech/osmosis-erpnext,gangadharkadam/verveerp,saurabh6790/test-erp,fuhongliang/erpnext,anandpdoshi/erpnext,indictranstech/erpnext,gangadhar-kadam/adb-erp,saurabh6790/medsyn-app,Tejal011089/paypal_erpnext,saurabh6790/test-med-app,gangadharkadam/v5_erp,suyashphadtare/vestasi-erp-jan-end,BhupeshGupta/erpnext,gangadharkadam/saloon_erp,gangadhar-kadam/verve_test_erp,gsnbng/erpnext,pawaranand/phrerp,hatwar/buyback-erpnext,netfirms/erpnext,dieface/erpnext,njmube/erpnext,gangadhar-kadam/helpdesk-erpnext,mbauskar/helpdesk-erpnext,aruizramon/alec_erpnext,gangadharkadam/sterp,gangadharkadam/letzerp,SPKian/Testing2,hatwar/buyback-erpnext,gangadhar-kadam/mtn-erpnext,SPKian/Testing,saurabh6790/aimobilize,treejames/erpnext,gangadhar-kadam/verve_live_erp,gangadhar-kadam/latestchurcherp,rohitwaghchaure/erpnext-receipher,saurabh6790/omnitech-apps,indictranstech/phrerp,MartinEnder/erpnext-de,gangadharkadam/contributionerp,suyashphadtare/vestasi-erp-1,Tejal011089/trufil-erpnext,Tejal011089/med2-app,shitolepriya/test-erp,Suninus/erpnext,indictranstech/Das_Erpnext,rohitwaghchaure/digitales_erpnext,rohitwaghchaure/erpnext_smart,gangadhar-kadam/mic-erpnext,indictranstech/focal-erpnext,Tejal011089/digitales_erpnext,mbauskar/internal-hr,meisterkleister/erpnext,suyashphadtare/gd-erp,indictranstech/tele-erpnext,indictranstech/reciphergroup-erpnext,indictranstech/trufil-erpnext,saurabh6790/medsynaptic-app,sheafferusa/erpnext,gangadhar-kadam/verve-erp,pawaranand/phrerp,gangadharkadam/v5_erp,indictranstech/internal-erpnext,hatwar/Das_erpnext,indictranstech/biggift-erpnext,saurabh6790/test_final_med_app,gangadhar-kadam/laganerp,suyashphadtare/vestasi-erp-jan-end,saurabh6790/trufil_app,indictranstech/erpnext,rohitwaghchaure/GenieManager-erpnext,saurabh6790/omnit-app,gmarke/erpnext,indictranstech/osmosis-erpnext,mahabuber/erpnext,indictranstech/phrerp,gangadharkadam/saloon_erp,pombredanne/erpnext,gangadharkadam/johnerp,geekroot/erpnext,suyashphadtare/gd-erp,BhupeshGupta/erpnext,gangadharkadam/v4_erp,gangadharkadam/vlinkerp,indictranstech/focal-erpnext,gangadharkadam/sher,indictranstech/fbd_erpnext,shft117/SteckerApp,Suninus/erpnext,saurabh6790/test-erp,MartinEnder/erpnext-de,tmimori/erpnext,indictranstech/Das_Erpnext,hatwar/Das_erpnext,4commerce-technologies-AG/erpnext,tmimori/erpnext,mbauskar/helpdesk-erpnext,gangadharkadam/letzerp,saurabh6790/omnisys-app,gangadharkadam/office_erp,mbauskar/phrerp,Drooids/erpnext,Tejal011089/trufil-erpnext,susuchina/ERPNEXT,Tejal011089/fbd_erpnext,hatwar/buyback-erpnext,mbauskar/internal-hr,tmimori/erpnext,Suninus/erpnext,rohitwaghchaure/New_Theme_Erp,mbauskar/alec_frappe5_erpnext,saurabh6790/aimobilize-app-backup,pawaranand/phrerp,gangadhar-kadam/church-erpnext,fuhongliang/erpnext,suyashphadtare/vestasi-erp-final,saurabh6790/test-erp,rohitwaghchaure/erpnext_smart,gangadhar-kadam/verve_erp,Tejal011089/digitales_erpnext,suyashphadtare/vestasi-update-erp,Tejal011089/huntercamp_erpnext,shitolepriya/test-erp,sheafferusa/erpnext,sagar30051991/ozsmart-erp,MartinEnder/erpnext-de,gangadhar-kadam/verve_live_erp,Tejal011089/huntercamp_erpnext,gangadharkadam/office_erp,gangadharkadam/sterp,indictranstech/osmosis-erpnext,suyashphadtare/vestasi-update-erp,Drooids/erpnext,susuchina/ERPNEXT,ShashaQin/erpnext,anandpdoshi/erpnext,4commerce-technologies-AG/erpnext,rohitwaghchaure/digitales_erpnext,suyashphadtare/test,saurabh6790/med_app_rels,sheafferusa/erpnext,Yellowen/Owrang,gangadhar-kadam/sapphire_app,dieface/erpnext,gangadharkadam/v6_erp,rohitwaghchaure/digitales_erpnext,saurabh6790/tru_app_back,SPKian/Testing2,indictranstech/internal-erpnext,gangadhar-kadam/powapp,gangadharkadam/v4_erp,hatwar/buyback-erpnext,indictranstech/osmosis-erpnext,anandpdoshi/erpnext,indictranstech/buyback-erp,saurabh6790/omnit-app,meisterkleister/erpnext,hernad/erpnext,mbauskar/alec_frappe5_erpnext,saurabh6790/pow-app,gangadhar-kadam/laganerp,saurabh6790/tru_app_back,gangadharkadam/saloon_erp_install,gangadharkadam/tailorerp,gangadharkadam/saloon_erp_install,shitolepriya/test-erp,gangadharkadam/office_erp,gangadhar-kadam/hrerp,gangadharkadam/verveerp,saurabh6790/test-med-app,rohitwaghchaure/erpnext_smart,mahabuber/erpnext,indictranstech/tele-erpnext,gangadhar-kadam/smrterp,susuchina/ERPNEXT,saurabh6790/omn-app,mahabuber/erpnext,indictranstech/vestasi-erpnext,ThiagoGarciaAlves/erpnext,mbauskar/phrerp,indictranstech/reciphergroup-erpnext,njmube/erpnext,gangadharkadam/smrterp,gsnbng/erpnext,mbauskar/omnitech-erpnext,sheafferusa/erpnext,indictranstech/trufil-erpnext,saurabh6790/test-erp,mbauskar/Das_Erpnext,suyashphadtare/vestasi-erp-jan-end,mbauskar/alec_frappe5_erpnext,indictranstech/erpnext,saurabh6790/pow-app,rohitwaghchaure/erpnext-receipher,hatwar/Das_erpnext,gmarke/erpnext,susuchina/ERPNEXT,gangadhar-kadam/verve_erp