Retrieving a bundle and then calling bundle.GetBitmapFor() gets us correct scaling even for Ribbon tools and buttons that support wxBitmapBundle.
This PR fixes problems with Mockup image size and display of wxRibbon tools and buttons. The Mockup now scales the images to match the DPI of wxUiEditor's mainframe window.
Retrieving a bundle and then calling bundle.GetBitmapFor() gets us correct scaling even for Ribbon tools and buttons that support wxBitmapBundle.
This PR fixes problems with Mockup image size and display of wxRibbon tools and buttons. The Mockup now scales the images to match the DPI of wxUiEditor's mainframe window.