Improve launch sequence

[BPerlakiH]

The problem:

Currently there's no splash screen on iOS, and the initial loading state is not shown to the user. This results in a completely white screen on app start, for relatively long time:

iphone_fresh_install_start.mov

[BPerlakiH]

@kelson42 I double checked it, there's no way to add an animated gif to the splash screen. That would animate properly.

[kelson42]

@BPerlakiH Then I guess we will have to keep current approach. Le see how looks next screen cast you will upload.