Allow push the same scene into navigation stack multiple

[simonwang6666]

Version

• react-native-router-flux v4.0.1
• react v16.4.1
• react-native v0.57.0

Expected behaviour

Allow push the same scene into navigation stack multiple which was supported @4.0.0-beta.31

Actual behaviour

Actions.push called just like Actions.refresh

Steps to reproduce

As i have a demand to select a district(country -> city -> area), i provide a scene named "distictSelect" which accept an array of location datas to display a list of items for user to select. Once i call Actions.distictSelect by passing the data of countries, i am suppose to calculate the array of cities and call Actions.distictSelect again to start an new page to provide a city selections after user selected his/her country and same as the area. In that case i think it is necessary to allow push the same scene into navigation stack muliple.

[daviscabral]

Duplicate of #3176. This was already fixed on #3190 but the code was not released under a new version yet. To get the fix, you will have to install the code from master.

I recommend to wait - 4.0.2 should be out today or tomorrow.