the new template allows to use a favicon in media/wiki/favicon.ico so we
should support uploading it as well.

See
http://stackoverflow.com/questions/805107/how-to-create-multiline-strings
for info on them.

We had a lot of options lumped together under "Advanced Settings". I
introduced two more categories and move a few options to other existing
categories.
I also reordered the appropriate entries in the source files to make it
easier to find stuff when extending the options.

We had a lot of options lumped together under "Advanced Settings". I
introduced two more categories and move a few options to other existing
categories.
I also reordered the appropriate entries in the source files to make it
easier to find stuff when extending the options.

removed all browser-specific gradients as the recently (in 42ff6730) introduced svg makes them unnecessary

fixed performance issues with gradient in Firefox (which also added gradient support for IE9) (FS#2447)

* removed all occurrences of '-moz-linear-gradient'
* added SVG as fallback for Firefox, IE9 and other browsers to page background and buttons