CSS update

Submenue styles added + class nav-spacewalk renamed to spacewalk-main-nav
Probe list uses the content-nav manually with html and sets the class
active/no active using controller context variables.
rename font icons to have name convention spacewalk-icon-$name
Use less files for bootstrap and the main css.
We need to look at a way to precompile them for production.
typo: it is alert-info
Move SSM bar outside of the <header>
Add missing form-control class and a placeholder string
Fixed error in the font

I fixed a typo in the @import
use fontawesome icons on the probe list
add the bootstrap less files until we generate css at build time
Fix legend on the Overview page
Removed colons before the user and org name
Remove the search button text
Update of spacewalk Less

Styles for login form and system management panel applied
TB3: Single system Properties form
TB3: Single system remote command form
footer

Footer right margin deleted
Show the spacewalk-bar only if the user is authenticated
TB3: User info and account info form
TB3: Account info form finished.