i18n: Fix ignore to capture folder

The original intent of this was to only add the files as part of a force
commit
Bower: Convert to spaces

Bower will convert back to double spaces like package.json when touched
Build: Use bower jquery to populate CDN version

Fixes gh-4816
Splash Page: Remove old reference to test partial
Build: Remove Bower interactive hack

This has been patched upstream
Merge pull request #5041 from nschonni/v4-build-cleaning

V4 build cleaning