Cabling/patch registration and presentation in need of serious usability improvements

[John-Magne Bredal]

An improvement of the cabling and patch system was requested by the Linköping University. Important parts were:

- long loading times when listing cables
- long loading times when listing patches
- bad user interface for adding patches

[John-Magne Bredal (john-m-bredal)]

Last changeset for these changes were
https://nav.uninett.no/hg/default/rev/996e802d80c7

[John-Magne Bredal (john-m-bredal)]

A bit more details - there were three main updates

Cables
- Cabling view rewritten to use paging via DataTables and API.
- Loading speed increased to an acceptable level
- Sorting now easily available
- Added search and filters on rooms
- Removed mandatory flag on most of the cable fields.

Patches
- Patch view rewritten to use paging via DataTables and API.
- Loading speed increased to an acceptable level
- Sorting now easily available
- Added search and filters on room and device.
- Switch-based view for quickly adding several patches.

All patches and cables are now available from the API