External/Internal links in header

As an Admin I'd like to add links to sister-resources like articles or conferences at the forum

Acceptance tests:

• Given I've got ADMIN permissions for JCommune component, I can see Add Links button near forum title (where the links are located)
• Given I've pressed Add Links button, I can provide a link, its title and a tooltip in language I choose (no translation is available)
• Given I've added a link, users can see it on every page
• Given the link is added and I have ADMIN permissions for JCommune component, I can see Remove and Edit buttons when the mouse is over one of links. Buttons should be taken from our set of glyphoicons.
• Given I've pressed Delete button, I should see a confirmation dialog.

The way we show links differs depending on whether we're in usual view or mobile view (see in attachments). In usual view links appear only when user points his mouse onto the forum title.

• Validation of input data of the window is implemented in the scope of this issue.

Validation rules to add/edit links
1) Name: required, max length 30 characters, min length 1 character
2) URL: regexp (<protocol>://text) protocols

, required, max characters 512, min characters 10
3) Hint: not required, max characters 128