More changes surrounding 'fit to canvas'
More changes surrounding 'fit to canvas'

- adds a global hotkey for 'fit to canvas' (CTRL+F)

- makes sure to fit image to canvas when reloading SVG-Edit

Glutanimate/image-occlusion-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-2-enhanced,Glutanimate/image-occlusion-2-enhanced