Optionally disable the menu opening animiation

[jleepeak]

Animations seem to often be really screwed up on Android with react-native currently, and I've experienced the same thing with react-native-menu. The menu will 'flicker' briefly when opened. This is a temporary workaround that just disabled the animations if you setup a MenuContext like this:

[scriptfans]

+1 for this.

[bryaneaton13]

I just opened a PR to fix the Android flash. I still like this to be able to disable the animation, but I just wanted to let you know.
I would like an option for different animation types. This could make the menu opening more like the native Android functionality where it opens from one of the corners and kind of slides in.

#33

[fabriziomoscon]

@jaysoo I would also like the possibilities to disable the opening popup animation.
Each app UI is different from each other and for some apps having a scale animation will not look consistent with the rest of the UI.
Having the possibility to disable animation by config will be super!