Implement markup shortcuts to make it easier to style a Feature or Comment Merged

Coming from JIRA, I'm finding the lack of keyboard or markup support in fields like this editor field is frustrating. 

With JIRA, I can use markup like {{monospace}} to make the text inline monospaced or ~strikethrough~ to make the text struck through without lifting my finger off the keyboard. 

A full list of the syntax supported in JIRA is documented at https://jira.atlassian.com/secure/WikiRendererHelpAction.jspa?section=all

It would be a great user experience for me if you added something like what is described in the link.  Markdown or Wiki style markup support text customisation within Features and Comments, or wherever the WYSIWYG text field is present. 

Perhaps adopt a Markdown flavour or Wiki style markup support text customisation within Features and Comments, or wherever the WYSIWYG text field is present. Having the ability to type stuff like:

h2. Heading 2

or

## Heading 2

to get

Heading 2

would be a big productivity gain for me. 

If I was integrating with JIRA, I would expect any changes I make in the WYSIWYG field to be transformed across to the syntax supported by the integrated service.