[WIP] show tags in list item view

[Strubbl]

Currently i am working on displaying the article's tags in the list of the articles. This implementation is not finished yet.

I pushed it here to save my work. And i hope that some is willing to give some input or add some code to improve this feature.

Currently open task for this feature from my point of view:

• fix CI error
• clean up code (check if areTagsAdded is really needed)
• use case: see list of articles, open one to read, edit its tags, go back to list of articles. Problem: list of articles has still old status of tags
• support theming of the tags
• change tag font color to the same of the url below them

Current status of implementation:

[ngosang]

@Strubbl I will love that feature, please continue your work when you have free time.

[Strubbl]

I am not going to finish this soon. I was on business trips in past and i am going to be on business trips the upcoming weeks, too. Therefore i do not have an android dev machine with me.
If anybody wants to help, feel free to add commits to this PR. I just rebased it to latest master.

[di72nn]

I'd like to see that feature done, but I think we need to implement async lists loading first.