BAP-135: Implement AJAX grid using backbons.js  - added type and value option getters for all filter types  - added list of constants that represent filter types  - fixed range filter types to render using one field  - implemented JS filter type views for all basic backend filter types  - fixed grid javascript template
BAP-135: Implement AJAX grid using backbons.js
 - added type and value option getters for all filter types
 - added list of constants that represent filter types
 - fixed range filter types to render using one field
 - implemented JS filter type views for all basic backend filter types
 - fixed grid javascript template

orocrm/platform-application,orocrm/platform-application,cbradescu/orotlt,jankkhvej/platform-application,jankkhvej/platform-application,vetal-e/academic_platform,cbradescu/orotlt,DMKEBUSINESSGMBH/adoro,cbradescu/deranjamente,cbradescu/orotlt,vshabala/academic,kos21/RADOROPlatform,kos21/RADOROPlatform,vetal-e/academic_platform,devXpro/OROBug,olegmack/oro-academic,cbradescu/deranjamente,vshabala/academic,devXpro/OROBug,EugenZi/oro-platform-app,vetal-e/academic_platform,cbradescu/deranjamente