Properly label category delete button.
Make info texts a bit more readable.
Change media_rename to button.
Remove pointless link.
Replace add upload link by button.

References #41
Replace plugin grablet icon with button.

References #41
Minor smallscreen layout improvements.
More minor smallscreen layout improvements.
Proper scaling in landscape mode.

There used to be a bug in older iOS version which is now fixed in
iOS6, so we can use a proper landscape mode without zoom.