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BUGFIX:fixed styling of asset upload page and dialog in the asset admin and media insert via WYSIWYG editor open/8231.
MINOR:adjusted position of "OR" on the asset upload field and removed right margin from "choose files to upload…" button on the insert media dialog - open/8231
DatetimeField->setDateField()/setTimeField()

Useful e.g. to override the time field with the
"silverstripe/timefield" dropdown
NEW Upload->replaceFile setting
Use the injector for creating tasks.
Force preview window to refresh on every save
Add a self method to the SSViewer scope.

This returns the current object, and resets the scope.
Long drop area title overlaps upload icon
BUG Adjust Session::setFormMessage to fit with underlying API.
Merge pull request #1177 from mateusz/session-set-form-message

BUG Adjust Session::setFormMessage to fit with underlying API.
API Add possibility to combine media-targeting stylesheets.
Merge pull request #1180 from mateusz/css-combining-media

API Add possibility to combine media-targeting stylesheets.
API Require ADMIN for ?showtemplate=1
API Require ADMIN for ?showtemplate=1
Merge pull request #1181 from chillu/pulls/showtemplate-admin

API Require ADMIN for ?showtemplate=1 (2.4)
Merge pull request #1182 from chillu/pulls/showtemplate-admin-ss3

API Require ADMIN for ?showtemplate=1 (3.0)
Merge pull request #1172 from robert-h-curry/preview-pane-refresh

Force preview window to refresh on every save
Layout regression in "add pages"

Unrelated fields affected by changes to CMS tooltips. See 1ca3883a769.
BUG: Fixed the injection of named services.