mod_base: Add optional tabindex to button tag.
mod_admin: admin_edit_form_top block needs to be in admin_edit.tpl

Bug introduced in 9ce2f10c73065f6b695d254495e5d47de1b8276d; the menu
editor did not display the menu anymore.
mod_admin: Make admin dashboard also use fluid layout
doc: Improve documentation for admin menu

Add the required `-include_lib` directive
mod_admin: Add 'url_append' parameter to admin sort field template
mod_oembed: Prevent crash in media tag when no oembed metadata is found.
mod_base: added touch punch to enable drag/drop and other touch events on mobile touch devices. Fixes #597
code: Add z_datamodel:manage/4

Add 'force_update' option to datamodel to force overwriting the
database with the datamodel value, even though it has been changed in
the database.
mod_oembed: Better error reporting and "fix all" button
mod_oembed: Update NL translation
core: Add `filter` option to query model

Allowing to do basic filter operations (=,!=, <, >, <=, >=) on the rsc
table and custom pivot tables. Also update the query model
documentation.
mod_base: fix in LiveValidation for resetting error class on textareas. Fixes #601
mod_base_site: add class 'wrapper' for content, allows for better styling. Hide breadcrumb and subnav when the current page is the only page in the breadcrumb or subnav.
core: filenames might have a space, escape it befor os:cmd/1
mod_oembed: Repair the repair function
mod_survey: Improvements

- Update NL translation strings
- Add placeholder text option for short answer fields
- Make the validation messages translateable for short answer fields
mod_survey: Fix wrong include
core: Implement "center of gravity" option for crops

No frontend yet, just the logic for specifying the cropping coordinate.
mod_admin: Create interface to pick the cropping center on images.
core: Fixes to image cropping with a center coordinate

The cropping point is now actually the center point around the crop
coordinate, not the top-left.

When 'crop' does not have any arguments and a resource id is given in
the image tag, it will load the `crop_center` property from the
resource and use this as the cropping center.

Also updated the documentation