This fixes the layout for the Show Toolbars groupbox in the Seamly2d Application Preferences from over lapping the checkbox text. Apparently the MacOS build wants the Show Toolbars content in a vertical layout as well where it seems the Windows build could care less.
Windens the width of the tool dialogs to 350 px and the Labels to 100 px to allow more display space for translated text.
Closes issue #1073