Some ProjectManager "Synchronize" feature changes

Renamed the two Project Tree Synchronize tooltips, because they were
confusing.
Added shortcut for locating active document in Project Tree. Default
Shift+Alt+L.
Created new setting to keep track of the current document in the project
tree.
Standardized spacing in files.
Merge pull request #522 from Neverbirth/sync_shortcut

Some ProjectManager "Synchronize" feature changes