* Fixed contributor avatar links
Had to put them in qtresource format so those will actually display in Settings -> About.
Reference: https://doc.qt.io/qt-5/resources.html#compiled-in-resources
* Added my avatar and updated documentation
* ChannelView: Rename mouse event related members
This is more in line with the naming of the other members as well as
future members.
* ChannelView: Add ability to scroll with middle mouse button
* Add scrolling resources
* Use custom icons for scroll cursor
* Slightly refactor scrolling logic
* Respect screen scaling when calculating scroll offset
* Nicer scrolling UX
This change allows scrolling to be feel smoother when close to the
starting point.
* Add scrolling with keeping middle mouse pressed
This mimics the behavior of browsers as well.
* Refactor ChannelView::enableScrolling
* Disable drag-scrolling on left or right click
* fixed color in light/white them when a tab lights pink
* fixes background color of chatterino in white/light-themes
* Fixed emoji-button in light/white-theme
* added light/white-theme addsplit-button
* forgot to add the image-file
