Previously tags where very much focused on color coding email and less about
adding additional information. They were also visualized in different ways in
different locations.
This commit gets rid of all "Color-coding" references, aligns visualization of
the tags across the whole project and tries to improve user experience of using
tags in general.
A search box is shown in the tagging control so the user can quickly search for
a tag if they have a huge (more than 10) amount of tags.
This code is nowhere used, so to prevent extra work during an upcoming refactor
of tags, it is removed and some related tests are now actually made useful
Mathy Vanvoorden