Git: Protect against removal of the "Local Branches" node

... When a single local branch is being removed

Change-Id: I4321d045ebb6faaf5f864ff33cb4f34c15d2264b
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Suppress show-ref command logging

Yet another plumbing command...

Change-Id: I88ba2349d8c15e47372addb3034f1bed2de170f2
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Remove refs/heads/ prefix from reset message in branches dialog

Change-Id: Ia93cbb52038c1ea29f5fa441c9eb0e88cb11d9aa
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Conditionally enable Reset button in branches dialog

Conditions:
* There is an active local branch
* The selected node is a leaf
* The selected node is not the active branch

Change-Id: I539dd13750737934378e503484646634e50a1aa7
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Reorder buttons in branches dialog

Reset works on current branch by the contents of another, like Merge and
Rebase.

Change-Id: I904823c177dd3c79ff8e1f49fe32d82be9bb8797
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Use `git describe` for topic before falling back to "Detach Head"

Change-Id: Iaf8be78ac3b6119f01ad3491eec7eccfa5f45e26
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>