change: remove links from blank content module hints in chooser
new: display SlipStream repo versions on footer version hover

Currently only 3 repos are displayed:

- SlipStreamServer
- SlipStreamConnectors
- SlipStreamUI

The version is displayed as the 'git describe' output on each repo.
fix: image cloud ids now correctly layouted, even if some are missing

@schaubl

Cloud IDs were wrongly accorded to the corresponding Cloud if some were
missing. Empty <dd> were the cause.
new: display if a run is mutable in summary section of run page

@mebster

This only happens for runs of deployments. Not for runs of images or
builds of images.
new: add '(beta)' next to 'Mutable deployment' labels

@mebster

This appears in 2 places: in the 'Run deployment' dialog and in the
summary section of the run page of a deployment run.
typo: change 'node' with 'node instance' in run dialog footnote
fix: hide overflow on run overview graphic
fix: make only help hint icon transparent on hover, not whole cell
new: when creating or editing a user, check that passwords match
change: directly show validation explanations on text change

Previously, the explanations about why an input field was not valid were
shown (on purpose) only after the first time that the user focused out
from the field.

Now we do not validate either the input field on focus out, but only on
text input change.
fix: only take into accout 'dirty' inputs in 'edit' or 'new' pages

Previously, modifying fields like the 'New module name' in the 'Copy
Module' dialog, triggered the 'page is dirty' flag, and the browser
asked for confirmation before leaving the page.
Merge branch 'feature/ui-revamp' of github.com:slipstream/SlipStreamUI into feature/ui-revamp
new: add shadow to the bottom of iframe in dialogs to hint scrolling

Note that the shadow fades away when the iframe is scrolled to the
bottom. However, on iframe load we do not check if the scrollHeight of
the iframe content is bigger than the iframe height, so that the bottom
shadow is always shown. This check could be done, but it might be an
overkill for a small effet, see http://stackoverflow.com/a/22991952.