Bug 1092948 - [FFOS2.0][Woodduck][Browser]Can't turn to landscape mode on editing bookmark screen when add bookmark to Home screen

* Remove incorrect orientation setting in manifest.webapp
Merge pull request #26131 from begeeben/1092948_cant_turn_to_landscape

Bug 1092948 - [FFOS2.0][Woodduck][Browser]Can't turn to landscape mode o...