Revert "reverted back to file-only checks, changed to file_exists()"
Revert "reverted back to file-only checks, changed to file_exists()"

This reverts commit d234b8e2128356a5d7c76e7d7048c21a26bd49c2.

toovy/grav,Pumpapa/chriswalters.nl,webuxr/iamrs,jeremykenedy/grav,frlan/datenknoten.me,Silwereth/grav,notklaatu/grav,Pumpapa/lucaswalters.nl,qbi/datenknoten.me,dimayakovlev/grav,undesign/undesign.github.io,userfrosting/learn,tomzx/blog.tomrochette.com,JamesPan/gravbox,tomzx/blog.tomrochette.com,enko/datenknoten.me,anapsix/dynamicinfradays,DonLiborio/grav,tomzx/blog.tomrochette.com,tomzx/blog.tomrochette.com,anapsix/dynamicinfradays,mikkeschiren/sekvenser-grav,Pumpapa/lucaswalters.nl,enko/datenknoten.me,userfrosting/learn,notklaatu/grav,frlan/datenknoten.me,sylvestrelucia/grav,frlan/datenknoten.me,JamesPan/gravbox,sylvestrelucia/grav,chkir/grav,qbi/datenknoten.me,shortsofia/testesitegrav.github.io,HarcourtsAcademy/grav-ha,toovy/grav,beacloudgenius/grav,frlan/datenknoten.me,getgrav/grav,jeffam/grav,enko/datenknoten.me,JamesPan/gravbox,enko/datenknoten.me,gigago/grav,nunull/grav,stell/grav,qbi/datenknoten.me,dimayakovlev/grav,Vivalldi/grav,joeyhenricks/a-broke-vegan,getgrav/grav,Sommerregen/grav,TheHiddenHaku/alessiobottiroli-website-grav,eivantsov/grav-blog-site,sylvestrelucia/grav,davistech/grav,anapsix/dynamicinfradays,Vivalldi/grav,qbi/datenknoten.me,tcsizmadia/grav,Pumpapa/lucaswalters.nl,lennerd/grav,attiks/grav,z3cka/grav,undesign/undesign.github.io,userfrosting/learn,sylvestrelucia/grav,userfrosting/learn,joeyhenricks/a-broke-vegan,jinxboy13/grav,JamesPan/gravbox,ccardinaux/grav-test,iMoonThailand/grav,Pumpapa/jacinthawalters.nl,VillainyStudios/grav,anapsix/dynamicinfradays