Also some general improvements to material.css and solarized.css

The double semicolon prevents LESS to compile the CSS file.

With the eclipse theme, if you move your cursor on a bracket and have the matching bracket option enabled, spans with borders are inserted. They push the rest of the line to the right by the amount of the border width, which looks very crappy. Using outline instead of border fixes this

Otherwise, you'd get a cursor/text misalignment in some fonts.

It's tiny anyway, no need to force people to include yet another file.

Signed-off-by: Jan Keromnes <janx@linux.com>