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
smaller corrections to make scruitinizer happier, no effective changes
bump version
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
coding style, no effective code changes
always abort running ajax request when the method is fired up again
show a spinner next to test filter button when the test is running
small corrections to config.sample.php
Page size calculation based on real page height

This is fix for https://github.com/owncloud/core/issues/10060
Instead of hard coding page size as 20 items, we check real page height, and divide by 50 (height of one row).
This will allow to load fewer items on small screens and enough items on large screens (4k, portrait orientation, etc.).
Also checking page height on every load to respond on browser window resizing,
Fix a comment.
Test Tags::getFavorites().
Test addMultiple() with $sync=true.