old style: make settings box expand to contain floating content and show menu nicely

The floating of the panes is hardcoded, so we also hardcode the necessary overflow auto.

Imported some of the GPLv3'd changes from RhodeCode v2.2.5.

This imports changes between changesets 21af6c4eab3d and 6177597791c2 in
RhodeCode's original repository, including only changes to Python files and HTML.

RhodeCode clearly licensed its changes to these files under GPLv3
in their /LICENSE file, which states the following:
The Python code and integrated HTML are licensed under the GPLv3 license.

(See:
https://code.rhodecode.com/rhodecode/files/v2.2.5/LICENSE
or
http://web.archive.org/web/20140512193334/https://code.rhodecode.com/rhodecode/files/f3b123159901f15426d18e3dc395e8369f70ebe0/LICENSE
for an online copy of that LICENSE file)

Conservancy reviewed these changes and confirmed that they can be licensed as
a whole to the Kallithea project under GPLv3-only.

While some of the contents committed herein are clearly licensed
GPLv3-or-later, on the whole we must assume the are GPLv3-only, since the
statement above from RhodeCode indicates that they intend GPLv3-only as their
license, per GPLv3§14 and other relevant sections of GPLv3.

Added separate default permission for external_auth account
activation. This flag allows users to define separate option of how
activation of external_accounts should be performed.

fixed sort of permissions summary it's now perm+name
unified permissions summary for users and user groups

sort permission lists by (repository) name

This also exhibits too much code in templates and code/template duplication.

improved title consistency
- changed - into dots to save space

Group management delegation:
this allows users to become an admin of groups
a group admin can manage a group, change it's name
or permissions. A group admin can create child group
only within a group he is an admin off.

Top-level group can be only created by super admins

Added UserIpMap interface for allowed IP addresses and IP restriction access
ref #264 IP restriction for users and user groups

implemented #663 Admin/permission: specify default repogroup perms
- added migration that adds new default permission for groups
- merged with patch from Vincent Caron

RhodeCode now has a option to explicitly set forking permissions. ref #508
- changed the way permissons on users groups behave. Now explicit set on user
is more important than permission set on users group

reimplemented tooltip, refactored tooltip_title into title for proper html,
and changed display strategy to right to temporary fix display problem with large tooltips

added cache reset, stats reset, and delete into repository settings in admin.
Some small template fixes