Description of problem:

The order of the columns rendered in the systems UI (or any UI using the same framework) is not stable. Columns can move places between reloads. 

The code which causes this is in: bkr.server.controllers.py:500 The order of the columns is influenced by the order of the keys in the dictionary from Turbogears.

Version-Release number of selected component (if applicable):

develop

How reproducible:

Can be tricky, since it depends on the ordering of the dictionary.

Steps to Reproduce:
1. Add an additional column to the default columns (use Toggle Result Columns) which is sortable.
2. Click the header to change the sorting. Check the placement of columns in the table who can change.

Actual results:

Columns move around.

Expected results:

Columns stay at the same place between reloads.