SysML-Export: Display warning, if no views have been selected (or select all views automatically)
When exporting a FileProject to SysML without selecting any views, an empty file is created. This could confuse users that do not know the intended way of using the export. It could leave the impression, the export would be broken.
A solution could be a UI dialog in cases of empty selections that either warns the user that he is about to export nothing. Alternatively the User could also be asked whether he wants to export all views.