Plone.app.mosaic

------------------

- Remove obsolete ``mockup-patterns-base`` -> use ``pat-base``
[petschki]

- fix TinyMCE drop-down menus in toolbar by implementing ``ui_container`` option
[petschki]

------------------

- Fix ``plone.app.contenttypes`` dependency for Plone 5.1
[agitator]

- Improve TinyMCE toolbar sticky computation
[frapell]

- fix .mosaic-width-quarter/.mosaic-width-three-quarters grid CSS to wrap correctly
[petschki]

- refactor mosaic-grid.less imports to avoid duplicated CSS selectors. (453)
[petschki]

- be more specific when removing top-margin
[petschki]

- safely read tile weight from registry
[petschki]

- refactor test-suites and add robot-tests
[petschki]

- Fix pip install command in ``.travis.yml``
[staeff]

- Fix byte-string join in ``main_template.py``
[1letter]

- Bug-fix in robot test
[1letter]

------------------

Bug fixes:

- add ``plone-container-xl`` width for mosaic-rows and fix layout when left toolbar is enabled/expanded
[petschki]

- Fix action button sorting (see 439)
[petschki]

- Fix issue with renamed IRichTextBehavior class
[petschki]

- Plone 5.1 compatible versions
[petschki]

------------------

New features:

- add uninstall profile for Plone versions >= 5
[petschki]

- add python 3 compatibility
[petschki]

Bug fixes:

- when deleting custom layout within ``manage custom layouts`` do not show currently selected layout in ``replacement layout`` listing.
[petschki]

- Add styles to remove top-margin on first elements in a grid-cell
[MrTango]

------------------

- Fluid row styles only make sense on pages without portlets.
In Plone 5.1.3 we can check that automatically (with plone.app.layout 2.8.0) and those styles are only active if no portlet columns are shown.
[agitator]

------------------

New features:

- Add functionality for fluid (full width) rows.
[agitator, davilima6]

- Add documentation for advanced editor features.
[agitator, davilima6]

Bug fixes:

- Image in "Existing-Content" Tile scaled width only, height was kept and aspect-ratio broke.
Fixes https://github.com/plone/plone.app.standardtiles/issues/83.
[jensens]

- Hide dependencies - like blocks and tiles - of Mosaic from appearing at Plone site setup.
This reduces confusion and removes clutter from the setup screen.
[jensens]

- Transform: Acquire a safe context or the portal object.
In cases of a 404 page, the context is a browser view.
[thet]

- Imports are Python3 compatible
[b4oshany]

- Cleanup old code that would initialize TinyMCE several times for richtext tiles
Fixes `issue 407 <https://github.com/plone/plone.app.mosaic/issues/407>`_.
[frapell]