Bootstrap 3 - Authentication fixes

When only one external strategy is enabled, the "Sign in" links, takes
you straight to the API endpoint.

A couple of small visual fixes are included such as:
 * aligning search icon with "Sign in"
 * proper padding in the sign in drop down
 * dotted border when in small view mode
 * new visual buttons for external strategies

As the external authentication buttons their designs have changed, the
auth-buttons.css file is no longer necessary so it has been removed.

Fixes for #3406 and 3446
#3390 - Vertical stacking of permissions summary
Bootstrap3 - Stacking of modal buttons
Aligned search icon with sign in button
Not showing login popover when the only enabled strategies are cas or shib.
Made the auth buttons for cas and shib skinnable
Bootstrap 3 - Setpermissions stacking improvements
Fixed an issue when the setpermissions got injected
for the same type (ie: collabdoc, discussion, ..)
multiple times
Aligning setpermissions summary text to the left on large viewports
Merge remote-tracking branch 'simong/bootstrap3-setpermissions' into bootstrap3-setpermissions
Merge remote-tracking branch 'simong/bootstrap3-setpermissions' into bootstrap3-setpermissions
Follow up on setpermissions
Fix permissions icon scrollbar issue
Fix permissions text being centered when the view isn't stacked
Merge remote-tracking branch 'simong/bootstrap3-authentication' into bootstrap3-authentication
Follow up on authentication fixes
get Open Sans font from Google CDN instead of local hosting (and include extended character sets)
Autoresize the comment input textarea when the user enters text
Show all button for activity collections > 3 items

This commit introduces a "Show all" button when an activity is a
collection of more than 3 activities. By default, only 3 tiles are
shown. When the user clicks the button, all remaining tiles are
displayed and the "Show all" button is removed.
Merge origin/bootstrap3 and fix conflicts
Set the browser title and top navigation logo title attribute to the tenant's displayName