Hide the Portfolio -> Import tab if no import plugins are enabled

[Aaron Wells]

The "Portfolio -> Skins" tab is hidden if skins aren't enabled.

The "Portfolio -> Export" tab is hidden if you disable all export methods.

But if you disable all import plugins, the "Portfolio -> Import" tab is still displayed, and it takes you to a page that says "The site administrator did not enable the import plugin. Therefore, you cannot use it. "

We should look at how we're doing this for the Export plugins and copy that logic for the Import plugins.

[Aaron Wells (u-aaronw)]

Reported on the Mahara.org forums: https://mahara.org/interaction/forum/topic.php?id=6403&offset=0&limit=10#post27134

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7582

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/7582
Committed: https://git.mahara.org/mahara/mahara/commit/f2d4bf133da11897a6e4a17ffad124ff1c1b117a
Submitter: Aaron Wells (<email address hidden>)
Branch: master

commit f2d4bf133da11897a6e4a17ffad124ff1c1b117a
Author: Robert Lyon <email address hidden>
Date: Thu Mar 30 13:53:12 2017 +1300

Bug 1421022: Hide import link when plugins disabled

Note: you'll need to clear cache (or disable/enable a plugin)
for the change to menu to appear

behatnotneeded

Change-Id: I81d9e02269972f49c578bd9edd581a348e09768e
Signed-off-by: Robert Lyon <email address hidden>