To achieve consistency with the icons in the Media Viewer panel,
the following has been adjusted:
- Colors onf the "share" icon to match the rest of the icons (updated to the new gray values of Agora).
- Size of the Commons icon has been adjusted both in the SVG file and when it is added in the LESS/CSS. Due to the different aspect ratio of this icon, extra spacing has been added to make it visually fit.
Change-Id: Ic14a869ea96ea1a8202c9988f0c5d330ba3e9a70
Also do a bunch of refactoring to:
* keep LESS rules in more sane locations so it is not as hard to get an overview
(most of the metadata panel rules were in mmv.less)
* move mmv.mixins.less up one directory as it is not specific to the UI
* move the SVG icons as all of them were related to the UI
* remove the marging-right hack which was used to keep the title text from
overflowing the button; instead use a float and overflow properties to make
sure text that is too long gets hidden
Change-Id: Icc8ea2e766be67d86ae98c734721b2185bd6c36e
