membership widget styling

Needs to update membership widget style after Bootstrap upgrading.

Change-Id: I34b730ac0f943cb8e341b163c271065246b9b45f
Closes-bug: 1347067
Add missing inline edit save and cancel icon

Did some clean up and added the missing icons.

Change-Id: Ib857ad4cc8bef1b26353ad88743dab43b32b50e3
Closes-Bug: #1349605
Redirect to the current page after edited instance

When the instances is paginated in multiple pages, if we edit an
instance not in the first page, after successful editting the instance
it will redirect to the first page and not to current one.

Change-Id: Iacfade81de0e3f5c225e17ec3a34ce7712e4ad6d
Closes-bug: 1353870
Replace force_unicode with force_text

Django changed the name to force_unicode and it's only available in
python2 as an alias of force_text. The new name is available since
Django 1.4.2

Closes-Bug: #1345642
Change-Id: Ida8c545ceec7c31999f2497d540a0dc5a653d286
Merge "Redirect to the current page after edited instance"
Merge "membership widget styling"
Merge "Replace force_unicode with force_text"
Merge "Add missing inline edit save and cancel icon"