Change 'Tree Key' to 'Tree ID'

fixes #1194 on github
Merge pull request #1381 from steventlamb/topic/1194_rename_tree_key_to_id

Change 'Tree Key' to 'Tree ID'
Inline helper method
Group translations

A good first step toward using a higher level feature for translating javascript strings. This object groups together strings that are passed through the python app for the sole purpose of supporting translation.
Add resource information to quickedit sidebar
PR fixup: Be more streamy.