Qt GUI: Make toolbar moveable but prevent it from being detached
Correction of 43289a54085aa55d5a881d94f1278a942138501e
Turns out the toolbar was designed to be moveable. The main intention of the previous commit was to prevent toolbar from being detached from main window. Now it is moveable but must be docked to one of the four sides of the window.
Qt GUI: Save shell extension preference
Prepare for future integration with IExplorerCommand-based shell extension on Windows.
The saved preference can be read from registry by the IExplorerCommand implementation to decide if it should be visible.
Qt GUI: Make toolbar moveable but prevent it from being detached
Qt GUI: Save shell extension preference
Qt GUI: Add inform version and timestamp options
Qt GUI: Add captions display options