Decentering of a centered text

[keshav234156]

If a text has already been centered by a user(and it may happen sometimes by mistake ) then it can’t be uncentered. Also if you want further paragraphs to be uncentered then it’s not possible now.

[jywarren]

Just labeling this bug -- let's try to do good thorough labeling here! Thank you!

[shreyaa-s-zz]

I've made the changes for wysiwyg mode. This is how the center aligning works in markdown.

else if (mode == "markdown") {
      chunks.selection = _module.wysiwyg.parseHTML("<center>"+chunks.selection+"</center>")
    }

    _module.afterParse();

Any ideas on how decentering could be implemented in markdown?
Also, how do we need decentering to work in markdown? I think the main purpose of a toolbar in markdown mode is for adding the syntax that the user might not be aware of. In md the users can easily see and improvise the -> and <- symbols used for centering, then do we need an interface to remove it as well? What do you all think?
cc: @jywarren @keshav234156 @NitinBhasneria @Shulammite-Aso

[keshav234156]

I think we should allow de-centering from the toolbar as well as all other modules all allowing it.
we can basically remove -> and <- from chunks.before and chunks.after