Fix HTMLText AbsoluteLinks not parsing placeholder

Add an AbsoluteLinks method to HTMLText that parses placeholders instead of returning the raw value.
typo fix

upated should be spelled updated
Fixing FormField not setting readonly attribute on setReadonly(true)
Upload: refactor file versioning
Correct line length and indentation
Updated translation masters
3.0.10-rc1 upgrading docs
Merge pull request #2993 from tractorcow/pulls/translation-update

Updated translation masters
Added change log to upgrade docs
Merge remote-tracking branch 'origin/3.0' into 3.1
Fix: WYSIWYG now returns valid HTML in tables

The WYSIWYG by default creates invalid HTML5. Creating a table and running it through W3C validator returns the following error: The border attribute on the table element is obsolete. Use CSS instead.
Add Behat behaviours to click links and submit forms in preview.
3.1.4-rc1 release docs
Merge pull request #2999 from tractorcow/pulls/3.1-release-docs

3.1.4-rc1 release docs
Include announcement links for security fixes
Merge remote-tracking branch 'origin/3.0' into 3.1
Documentation link fixes
Update index.md

topics/templates doesn't exist.
Merge pull request #3003 from OliBridgman/patch-1

Update index.md
Merge pull request #3000 from mateusz/preview-behaviours

Add Behat behaviours to click links and submit forms in preview.