RocketChat
Allowing previewing (markdown formatted) messages before sending
Is your feature request related to a problem? Please describe. When writing a message with markdown, you can't always be sure that how the markdown parser is going to interpret it, is how you want it to be interpreted. First, because a normal person doesn't read pages upon pages of markdown specs. Second, because a person is not a computer or a robot, and can't parse markdown with their eyes.
Describe the solution you'd like Have a button for showing a preview, or toggling a preview box/overlay, to show what the currently typed message looks like with markdown applied. A good example of this being done is GitHub's own "Preview" tab on this exact input box, allowing to see the formatted version of the issue.
Describe alternatives you've considered Copying and pasting to an online markdown parser, hoping it is perfectly compatible with RocketChat's parser. Or, sending and praying, and/or repeatedly editing a message because the formatting came out wrong.
Additional context Just click the "New issue" button, and see how GitHub does it.
@SlugFiller you can follow this ticket https://github.com/RocketChat/feature-requests/issues/806
