Revert "Hide AIR properties button / menu item instead of disabling them"

This reverts commit 1c6390be68794fd6a4f5399b94dc0015de2dc8aa.
AppMan to .NET 3.5 and locale file path fix...
Revert "AppMan to .NET 3.5 and locale file path fix..."

This reverts commit 562f3fe1a9e5d162f372c93355a421fb5c755918.
Locale file path fix...
Merge branch 'master' into development-linux