Improve performance of opening a window with the Profiles tool present when there are many profiles. We spent a long time calculting row heights. It's still slow because every row needs to be queried, but it's a lot faster than it used to be. Issue 6322

Use DEPRECATED_ATTRIBUTE to mark functions deprecated in the comments.

Move source into sources/ directory. Delete a few unused images in the process and fix a reference to an Aqua image in FindView

Fix vertical alignment of help buttons in command and directories tool and remove table headers from tools that don't need them.

Shut down toolbelt tools when they're removed from the view; otherwise the timers can fire after the window is closed

Fix bug where tools would become broken after becoming too short. Add Notes tool. Alphabetize tools. Add NSFileManager+DirectoryLocations.

Clean up BookmarkListView a bit. Add ability to change font size of bookmark list view. Remove useless toolbar delegate. Fixed drawer-related memory leaks. Added clear button to paste history. General cleanup of drawer-related things. Make all tools small-font. Hide tool close button when there's only one. Fix bugs around which views are visible, confusion with user defaults. Add jobs tool.

Improved BookmarkListView interface. Add toolbelt menu item. Add pref to show drawer. Add modifier + click to profiles. Save toolbelt prefs.