change featured collections on index.liquid

[jholl]

• update comments to show five collections instead of three (old ref)
• offset index operator > in case 6 collections before 'frontpage collection'
• move index counter inside unless 'frontpage collection' to work with offset

[jholl]

the forloop for collection in collections is looping through collections in alphabetical order - therefore if six collections alpha before 'frontpage' then they will all show up; however we want only five to showup. In current demo store, believe this 'works' because there are five collections 'collection-1, collection-2 ... etc' that show up before 'frontpage' thus frontpage is the sixth collection in the list. Add 'collection-6' to the demo store and things should be 'broken'

[cshold]

Good catch on this, and thanks for the PR. Tested and merged it in.