Open "External Link" in New Window - Plugins with Links

[wesleyboar]

Goal

Any link within a TACC plugin to an external website should automatically open in an external window/tab.

Requirements

1. Any TACC plugin link to external website should open in a new window when clicked*.
2. This feature should not require configuration by CMS user.

* When clicked without modification key from user. (Cmd+ click on Mac browsers opens link in new window.)

Direction

Done via #280 (see external_link).

Archived Idea

Use a Django filter "templatetag":

1. (Python) Parse any known URL before rendering a link.
2. (Python) Conditionally render target="_blank" attribute in link.
3. (Template) Apply the filter to CMS menu markup.
4. (Template) Apply the filter to article listing template/s (or a shared partial)