MWTransclusionDialog: Remove setMode() call from teardown()

teardown() runs after the dialog has been hidden (if you need it
to be visible, use close() instead).

However removing it instead of moving because it is obsolete,
this is something that should be done from setup() instead, and
already is. 

Bug: 65373
Change-Id: Ib6b4ab49f191d1d339e69934453786a82d97380f
(cherry picked from commit 37087f1f5fc850c416294d710ce97618a3c847bd)
Hide 'no results found' once there's at least one result

Naturally, the 'no results found' should only appear as long as there
are actually no results found. 

Bug: 52463
Change-Id: I0116b769b9e4995678975d43a74c54c4d426f672
(cherry picked from commit 3a9faa44fcc7bbf08eba1fd2c4b70a2c9c3c5770)
Merge "Hide 'no results found' once there's at least one result" into wmf/1.24wmf5