Ramo Mujagic

Results 2 issues of Ramo Mujagic

In Shoutem Builder, it is possible to select _Starting screen_ for the app. However, this config is not used in `TabBarNavigator`. This PR extends `TabBarNavigator` by adding support for `startingScreen`...

Hello, this PR is related to wrong video dimensions on iOS (#1504). As this is open a long time, I am not sure if there is intention to "fix" this....