JS Resolver API: Wrap base64 functions

Otherwise, we get TypeErrors
Merge pull request #248 from lorenzhs/fix-base64

JS Resolver API: Wrap base64 functions
* Style fixes to ConnectionManager.
Update What's New Inbox Icon on button
* Style fixes #2.
Flatten rest of icons in use and fix Xhochy's face
Clean up inbox button a bit more
* Larger hit area for seek/volume slider.
* Disable wheel-events on seek bar.
Make a better What's New icon
Update Whats New text
Show context menu in Inbox screenshot
* Keep system font for all menus.
* Test for OSX.
* Make enough room for CaptionLabel.
* Revert change.
* Make hit-area for sliders even bigger, while hopefully restoring them on OSX, too.
* Paint background in slider again.
* Readd top/bottom margins.
* More OSX testing.