Frame improvements

[akaDuality]

Continue of #326

UI improvements

• Allow to select frame from canvas
• Refactor element selection, the selected element should be preferred for selection
• Deprecate frame resizing or make it proportional
• When move an element over the frame should insert element inside container
  • And allow to move element's outside
  • Show it visually

Phone

• Update drawing at VODesignPreviewViewController to caching

Fixes

• Not clip element by container's bounds
• Can't add image to empty document, won't read NSPasteboard Recognize images during drag’n’drop when pasteboard contains URL #340

Other

• Restore AppKit settings to speedup Revert AppKit settings #339