Server-side source control improvements

[isc-bsaviano]

• Don't show source control menu options for root directories or directories in Web Application workspace folders.
• Don't check if source control is enabled before firing Other Studio Actions. These queries will return nothing if no source control class is enabled, so the check is just adding an extra query for no benefit.
• Move the progress notification to the window's Status Bar. This is less distracting IMO.
• Preserve focus when showing errors in the Output channel.
• Write queries to the Output channel as well as user actions when objectscript.studioActionDebugOutput is true.
• Add type for UserAction.

I won't merge this until #1313 is in