[WYSIWYG] Add option to Copy & Paste styles

Since new WYSIWYG it is not possible to copy directly styling, and I use old custom-color for sections, and there is no way to easily define custom color, so only option to change/add styling is to copy full name of desired color and change it's text to one you try to alter - I came with idea of adding known in other places copy & paste of styles.

Just like this:

Would copy info that it is green, regular size text, and paste it later to new place.

Ofc it would be useless if task is like name of this #6346, but turbo useful for sections as time saver.