[request] Add the ability to change tag formatting.

[MaxVonMustermann]

It would be great, if it was possible to alter the formatting in the table. For instance, I would like the table header that contains the specific tags to be customizable. For instance, the option to have a # in front of every tag. So the headline doesn't say "Examplehashtag" but "#Examplehashtag". Being able to set a certain color as a default for tags would also be great. Furthermore, it would be highly appreciated, if the "untagged" column could be renamed or replaced with an emoji or a dedicated icon.