gh-492 Display version and branch name of terminology when selecting for Code Sets

[pjmonks]

Resolves #492

[jamesrwelch]

This is brilliant - could we roll this out easily to other places too - for example when we create model data types? Is there an easy way to find other similar model drop-downs?

[pjmonks]

@jamesrwelch I've updated other areas which use a similar control:

I've updated the New Data Type wizard and the Element Selector (links for description fields).

Now that the label with branch/version is a shared component I've also looked at the tree views too. The new Favourites tree is updated but not the main model tree - too complex to fiddle with at the moment.

[jamesrwelch]

This looks great - I've made a minor tweak that I found when testing - making sure to load all results rather than paginating. Will accept when the build has gone through

[jamesrwelch]

This works really nicely - thank you!