Extra css class for a column block is not being applied inside the editor.

[Levdbas]

Describe the bug
Extra css classes for a single block column are not being applied in the editor.

To reproduce
Steps to reproduce the behavior:

1. Place columns block in the editor
2. Select one of the columns
3. In the right sidebar, under advanced, give the column an extra css class
4. The classname just entered is not being added to the column html element inside the editor while is being added on the front-end after save.

Expected behavior
The extra classname for the column block would be added to the column block as well inside the editor and not only on the front-end.

Desktop (please complete the following information):

• OS: Windows 10
• Browser Firefox
• Version 68.02

Additional context

• Used under Gutenberg plugin version 6.3

[HardeepAsrani]

It was also reported by one of our users. I've sent a PR which fixes it. :)

[munirkamal]

I can also confirm this bug. I am really hoping this gets fixed as this way we can apply CSS classes to individual columns and style them accordingly. This should be labeled as a "Bug" and not as "Enhancemenet" in my view.