Allow to copy articles

[JuliusR]

Fixes #541.

[JuliusR]

The article index already offers "edit" and "delete" buttons. This pull request adds a third button in between.

As a disadvantage, the table becomes even wider. I am not sure if this pull requests improves or worsens the usability on average. What do you think?

[wvengen]

Could you make a screenshot (perhaps even of different window widths)?

[JuliusR]

Width in px	without copy	with copy
375
800
1024
1280
1600

[JuliusR]

After looking at it more carefully, I am not so much bothered about the wide tables. It seems that the real difficulty are the "line breaks" between the buttons. This increases the table row height and leads to a small vertical spacing of buttons. With my mouse, I can safely point on one of them, but what about touchscreen devices?

We can prevent the buttons from "line breaking" by putting them in separate columns, but that would always reserve lots of space for the buttons. We should also consider languages where "edit", "copy", and "delete" have more characters.

What are your thoughts?

[f0k]

It seems that the real difficulty are the "line breaks" between the buttons.
[...]
We should also consider languages where "edit", "copy", and "delete" have more characters.

What are your thoughts?

[wvengen]

Ah, it's buttons breaking over the line is even better now, I'd say.
Icons may be nice, especially if we do it consistenly across the app.
Fine for now, I'd say.

[JuliusR]

I agree that we can merge this, and we can introduce icons later (if desired).