String tweaks:
* Empty pane message: say "pane" instead of "view", and say "open" instead
of "select" (to reduce the confusion in #9254)
* JS File Inference Problem dialog: ask users to file a Brackets bug; fix
capitalization; format more like other errors that call out a filename.
* Remove unused UNSUPPORTED_FILETYPE error & its corresponding string (I
think this was leftover from an earlier part of splitview)
Update Galician lang
Revert to the previous selection in the file tree if there's an error.

Fix for #9313.
Support ctrl-click for context on the Mac.

Fix for #9349
Fix comment for mouseDown handler
Fix other comment for file tree mouseDown events
Fix for #9328.
Kept jstree rename input text from shifting and tweaked unfocused pane header text color on light UI.
Merge pull request #9356 from adobe/dangoor/9349-bad-delete

Support ctrl-click for context on the Mac.
Trigger for shadow on file tree to move when working set changes.

This restores the same handling that was in ProjectManager previously.

This is a fix for #9358.
Merge pull request #9297 from ivarcia/master

Update Galician lang
Code review: Update link in JS code hints error dialog
Merge pull request #9280 from adobe/pflynn/string-tweaks

String tweaks
Merge pull request #9360 from adobe/dangoor/9358-tree-shadow-alignment

Trigger for shadow on file tree to move when working set changes.
Merge pull request #9317 from adobe/dangoor/9313-binary-file

Revert to the previous selection in the file tree if there's an error.
Merge pull request #9361 from adobe/larz/issue-9328

UI Fixes
Merge branch 'master' into alf_localization
Updated by ALF automation.