[462884] Adds and integrates MergeContainedNonConflictingAction into UI

Also incorporates filters that may potentially be applied to tree nodes.
Filtered tree nodes that represent differences will not be included in
the merge action.

Bug: 462884
Change-Id: Ie873dab03eb8d53a70ff70146680f292ef864e52
Signed-off-by: Philip Langer <planger@eclipsesource.com>
5 files changed