remove comments form overriden functions

I was just reading the Moodle style guide and it suggests
not to repeat the comment block on overriden functions

http://docs.moodle.org/dev/Coding_style#Functions
remove .warning class

only seems to be used by xmldb and clashed with the utility
class in Bootstrap 3 of the same name
use extend to make /report/security use BS labels

These classes are only used on one admin page so I'll file
a bug to try and at least combine them with the similar classes
that are only used on another admin page for the environment
and maybe at the same time introduce a renderer for Bootstrap
style labels.
organise the plugins css to group related stuff
save some space for plugins with no icon
this html no longer exists I believe
make plugin-control-panel status messages labels
use bootstrap classes on environment table

The table you see on updates. The changes are tiny but the render
is absolutely massive and scary with display and logic firmly
intertwined. I'm going to try to get the classes added to core
but in the meantime here's a find and replace version.

Getting it into core is complicated by the fact that text-error
and label-important got harmonized to -danger in Bootstrap 3.

Also removed the table-condensed rule to make the links more
finger friendly on mobile.
add alias for exec:decache
update docblock example
remove commented out admin form styles

These should all be covered by the recent changes in forms.less
which is the appropriate place for them anyway.

Also deleted the border on the device detect regex table since
it was right next to them and I just saw that my change to fix the
underlying problem was just integrated in 2.6 and master.
using media queries to limit input width

Just for discussion, the 500px value was chosen mostly at random,
so give others a try.
Merge pull request #118 from ds125v/function_comments

remove comments form overriden functions
Merge pull request #126 from ds125v/environment

use bootstrap classes on environment table
Merge pull request #127 from ds125v/misc

Misc
merged
Merge pull request #129 from jobyh/master

Add exec:decache task alias
tempfix
merged #132
Merge branch 'master' of github.com:bmbrands/theme_bootstrap