Improving Hovercards' settings dialog to fulfill design specification.
Also fixing HTML structure by removing invalid `radiogroup` element and
adding missing `</div>` element, fixing related QUnit test.
Changes:
* Add close icon instead of using text
* Style header as a table for alignment
* Remove redundant "OK" button and have it replace "Save" instead
* Update text of "OK" button to "Done"
* Fix description for translation of "Done" button
* Fix qunit and selenium tests
* Remove unnecessary markup and less
* Add mediawiki-ui-button and mediawiki-ui-icon dependencies
* Shrink dialog width some per design spec
* Fix dialog horizontal position calculation to remove hard-coded value
Bug: T138612
Change-Id: I7395e3438836149becdd576942bdaf6f21b4163f
* Change labels in English for settings options
* Update description for enable option
* Remove description for disable option
Bug: T138233
Change-Id: Id23dcc7b7e655f7939bb2e455b8680ed5a2c6331
Linkpreview will try to fetch a text extract using the api and, if this
doesn't fail, show the extract as a drawer with a button "Continue to
article". If the query fails, it will redirect the user to the article
directly.
Bug: T113243
Depends-On: I6d8c5b80e70c3d8d1a92a70cc91e1b90d598cb0f
Change-Id: Idbaae9fe2decd89b73e623a25fbd39464c316fb2