Issue #625958 followup by slashrsm, chx, andypost, yched: [Follow up] Support Uploading Multiple Files for HTML5 Browsers via #multiple attribute.

Issue #1981198 by yched: Change notice: More accurate names and form_ids() for Field UI form classes.

Issue #1946404 by tim.plunkett, amateescu, swentel: Convert forms in field_ui().admin.inc to the new form interface.

Issue #625958 by slashrsm, quicksketch, eojthebrave, droplet, danlinn, czigor: Support Uploading Multiple Files for HTML5 Browsers via #multiple attribute.

Issue #1852966 by yched, Stalski, zuuperman, swentel: Rework entity display settings around EntityDisplay config entity.

Revert "Issue #1852966 by yched, swentel: Rework entity display settings around EntityDisplay config entity."

This reverts commit 8ad67af2.

Issue #1852966 by yched, swentel: Rework entity display settings around EntityDisplay config entity.

Issue #552604 by sun, lambic, swentel, yched, Lukas von Blarer: Adding new fields leads to a confusing 'Field settings' form.

Issue #1785256 by yched, Stalski, zuuperman, sun, tstoeckler, aspilicious, EclipseGc, larowlan: Widgets as Plugins.

Issue #1184272 by Berdir, corvus_ch, sun: Remove deprecated $conditions support from entity controller.

Issue #1711070 by kid_icarus, tim.plunkett, xjm, droplet, zendoodles and cam8001: Convert tests to use ::$modules property instead of parent::setUp($modules).