Added all viewer icons in hover and not
Coloured if neccessary
Applied changed to jsons
Fixed some things in viewer app
refs #736
Fixed auto icon sizing
Fixed returning to library view
refs #736
Merge branch 'master' into viewer-icons
Added more suitable viewer auto icon
refs #736
Merge branch 'master' into viewer-icons
Modified all viewer spacings to fit project more
Improved viewer style properties in css
Connected header to display albums names
Improved progress bar label
refs #743
Merge branch 'viewer-icons' into viewer-layout

Conflicts:
	pisak/viewer/album.json
	pisak/viewer/app.py
	pisak/viewer/library.json
	pisak/viewer/photo.json
	pisak/viewer/photo_editing.json
Merge branch 'master' into p-enh

Conflicts:
	pisak/viewer/album.json
	pisak/viewer/app.py
	pisak/viewer/library.json