tests: add tests showing that the color chooser is not initialized with the user's color
tests: add tests showing that the color chooser is not initialized with the user's color

When opening the color chooser after a page load, the selected color is always
gray, and not the user's color.

aptivate/etherpad-lite,joequant/etherpad-lite,aptivate/etherpad-lite,storytouch/etherpad-lite,storytouch/etherpad-lite,ether/etherpad-lite,joequant/etherpad-lite,aptivate/etherpad-lite,aptivate/etherpad-lite,storytouch/etherpad-lite,joequant/etherpad-lite,ether/etherpad-lite,joequant/etherpad-lite,ether/etherpad-lite