Add the optional Qt::MSWindowsFixedSizeDialogHint parameter to all uses of the QInputDialog::getX static functions to silence a Qt/Windows debug mode warning about QWindowsWindow::setGeometry: Unable to set geometry. Increase the size of the unit calculator to eliminate the same warning. Finally, call adjustSize() on the "Unsaved Changes" dialog to silence the warning.
A new document object App::TextDocument. It has a property Text which
holds the text of the document as a string. This commit also contains a
full size editor based on QPlainTextEdit. It can only be used by the
TextDocument and has a read only mode invoked for read only documents
(ReadOnly property set to true). The editor is invoked by a double
click on the TextDocument.