Underline code can not be undone after I use it

[shaphir]

Expected behavior

On create post, there is some writing code to tidy up the writing, it should i can be Undone underline code after i press it.

Actual behavior

After I press the underline button, I cannot be undone it anymore.

How to reproduce

• Open the app

• Presing create post

• In the story, you press the underline button to test it
  and afterwards you undone it, underline cannot be canceled.

• App version: 2.0.3

• Operating system: Oppo A57 android version 6.0.1

Recording Of The Bug

https://youtu.be/eVY8csbLepU

[tobias-g1]

I was able to replicate on Android 6.0.1 on version 2.0.3, take note of the video as it shows the exact steps in more detail.

[BoomAppsLLC]

We know this problem and the issue requires serious app changing to fix it. Currently we work on it.

[BoomAppsLLC]

pull request #39