Moving buttons from Toolbar into 3D-View.

The following were also done as part of this commit.
 - Disable SelectionControlToolbar.
 - Delete Undo Redo buttons from 3D view.
 - Move QueryData button to MainControlsToolbar.
 - Handle logic in a specilization of pqRubberBandHelper called
   pqSlection3DHelper.

The pqSlection3DHelper class does the following
 - Manages all selections
 - Ensures that only one selection is enabled at any given time.
 - Makes 3D interaction mode implicit.
 - Enables new behavior where selections can be pressed and released.

Change-Id: I831babf266780e3b490bf4defa1592d15d468ed6
Deleting SelectionToolbar and references.

Change-Id: Ic67ef687e06aaea501fd1ad1f488a68f0325466b
Merge topic '0013752-move-selection-toolbar-above-3d-view' into next

b52d4ec Deleting SelectionToolbar and references.
efe5a43 Moving buttons from Toolbar into 3D-View.
Fix test failing due to selection move to 3D-View.

Making sure that all test using selectionToolbar not use the button
present in the 3D-View.

Change-Id: I6085b48dfda29da159a05148767ed6c4997994d9
Merge topic '0013752-move-selection-toolbar-above-3d-view' into next

2fc9d62 Fix test failing due to selection move to 3D-View.
Making UndoRedo7 use the EditMenu functions.

Since the ForwardButton and BackwardButtons were deleted for
CameraUndo/Redo, the test will use the CameraUndo/Redo from the EditMenu.

Change-Id: I3b430a939777371871b8ea4c3d114d7f62a8df6e
Merge topic '0013752-move-selection-toolbar-above-3d-view' into next

25274cc Making UndoRedo7 use the EditMenu functions.
Fix typo in VRUIConnection

Change-Id: I5566066077ecb445c18e90c220935bc6647978c3
Merge topic '13862-VruiTypo' into next

370730e Fix typo in VRUIConnection
BUG #13863: Fix visibility animation.

When animating visibility, we were turning on visibility of *all*
representations, including those that were added as subproxies to some other
representations. Hence all the representations ended up being visible are
indicated in the BUG #13863. This fix address that issue by skipping toggling of
visibility for sub-proxies.

Change-Id: Ic210b43e95669ac4d12787f2f62b461b5f2a6356
Merge topic '13863_fix_visibility_animation' into next

2752d7e BUG #13863: Fix visibility animation.