Location hints for uploads

[justparking]

When dragging and dropping content into editors, location hints could be provided based on the content extension.

e.g. ____.jpg should have hint content/img/____.jpg

___.css should have hint content/css/___.css

___.htm, ___.html, ___.xml, etc. should have hint content/___.___

[justparking]

Including the above:

• any common image format should have content/img/____.__ hint
• index.xml should have content/index.xml hint
• .py and .json should have no hint