Add option to copy user name

Detailed steps causing the problem:

• Open detail page of a cache
• Click on owner name

Actual behavior after performing these steps:

A menu with many options is shown, however simply copy the user name is missing

Expected behavior after performing these steps:

Add an menu entry to copy the owner name

Version of c:geo used:

2017.02.23-NB1

Is the problem reproducible for you?

Yes/No

System information:

Attach system information here if available (see c:geo menu -> About c:geo -> Swipe right to System)
Keep the apostrophe at beginning and end to have it properly formatted

Other comments and remarks:

Same for all other menus, where the user can click on a users name (e.g. logbook)

[Lineflyer]

@pstorch Setting you as stand-in assignee (AFAIR thats the way we did it in the past).

[FreddieSanchez]

@AlphaDeltaIndigo This fix has not yet been incorporated into the release branch yet.