This resource bundle wraps the resource bundle of an EMF Compare content merge viewer to default to the
 resource bundle of the Eclipse Compare TextMergeViewer for any non-defined keys. The TextMergeViewer
 already defines the label, tooltip and image for the following actions:
 
 - CopyLeftToRight
- CopyRightToLeft
- CopyDiffLeftToRight
- CopyDiffRightToLeft
- NextDiff
- PrevDiff
- NextChange
- PrevChange
- EnableAncestor
- IgnoreAncestor
- SwitchLeftAndRight (added in Oxygen)
 Specifically, this class avoids the problem of re-defining the images which may change between versions,
 e.g., the change from gif to png done in Oxygen.