Removed memory leak.

If warnings was appeared - dialog with warnings details appeared. Each warning is a separate QTextEdit.

That mechanism is general for UBExportAdaptor and can be simple implemented and used in any import or export adaptor.

UBToolWidget.cpp/.h cleaned too.

Impossible to write an ê and an ë using the keyboard

Trying to position ToolWidget at the right place to move naturally from widgetitem to toolidget.

The old code has to be removed and remaining bugs fixed.

Show desktop: "Add folder" make sankore freezes after virtual keyboard was opened

UBToolWidget API has been deactivated, there is certainly a lot of bugs, code is ugly.
Remember to fix commented sections (forgotten which ones).