Automatic deselect on left click (desktop version)

This change is meant to automatically deselect items on left click (No modifiers).

This feature could be improved by adding "onLeftClick" event in mauikit file browsing FileBrowser.qml and put this change in there to make it more consistent with the other events in regard of the file browser

I disabled this feature in the mobile version because i feel like it would get in the way when trying to select multiple items.