Replacing vertical background gradient with single color, as no
faux 3D gradients are part of current style guide.
Change-Id: If98a6cb22a9551a5d69d782759eadd5cec7e0efc
Following core base font-size of `0.875em` in Vector to align with
other elements on the page.
Bug: T175295
Change-Id: Id9c8652820641d6fa1c6b1dd06247967ba649f25
Using close icon of WikimediaUI icon collection, which is also
already in use by OOUI.
Bug: T50067
Bug: T175295
Change-Id: I83e435a7215708c5a5eae77eeca29632ed64f608
Replacing all colors with current WikimediaUI palette ones.
Also:
- changing two files over to LESS in order to
- make use of central gradient mixin instead of one with
unnecessary vendor extensions and
- concatenating selectors in one occurrence.
Bug: T174237
Change-Id: I5d302f29b079f6abdba5abf3b58d6ba254e1a4ac