Issue #479: Improve feature: The Preferences dialog box should be expandable (dismine/valentina)

New issue 479: Improve feature: The Preferences dialog box should be expandable https://bitbucket.org/valentinateam/valentina/issues/479/improve-feature-the-preferences-dialog-box

Susan Spencer:

The Preferences dialog in valentina.exe is not expandable. The user cannot see the entire directory path to their patterns, measurements, templates. This is a usability issue.

The user should have the ability to drag an edge or corner and make the Preferences dialog larger.

If possible it should open with the last size used.