Restore various default workspaces by using menu

[demvlad]

There are two various default workspaces in the current release and nightly Blackbox explorers versions at this moment (@SupaflyFPV, @ctzsnooze workspaces) . Anyway, it is unpossible to restore default workspace after change. It is necessary to edit some system files to show default workspace again. On the other hand, there were suggestion to do possible using of several default workspaces (@mituritsyn). This PR do that. Press Shift+W keys to show menu and select workspace preset what you need in any time. ATTENTION!!!! Your current workspace will be rewritten after that. Save it before!