Remove uneeded slicing of element

The "*/*" provider has been removed. This is therefore not needed anymore and leads to unexpected bugs.

Please notice that this is only relevant for master.
add checkbox for experienced users to server tab
must be empty not auto
sets user filters to raw mode when marking user as experienced
Objectlasses, Groups and Attributes are now loaded only in assisted mode and only once
user and group counts are only upated on demand in experienced mode
confirmation before switching to assisted mode when admin is experienced
rename internal var name to avoid collision
more beautiful white spaces
Prevent button click when enter key is pressed in LDAP wizard

Pressing enter in the LDAP wizard will trigger a click on the first
button. In the main page it would trigger the delete dialog, which is
quite inconvenient.

Added a type attribute to suppress this behavior.
smaller corrections to make scruitinizer happier, no effective changes
bump version
Log warning when no uid was found for user

In some incomplete setups (like mine) it can happen that the uid
attribute of users is missing.

To be able to find out that something is wrong, a debug message is now
logged when it has not been found.
fix triggering of group update counts. improves the basic code which is also responsible for user counts. i did not find regressions, please doublecheck
remove debug output
make sure that we always delete oldest first
coding style, no effective code changes
fix performance issues
Merge pull request #11480 from owncloud/ldap-enterkey-deletefix

Prevent button click when enter key is pressed in LDAP wizard
Merge pull request #11499 from owncloud/ldap-warningwhenuidismissing

Log warning when no uid was found for user