Label markdown formatting does too much

[will-moore]

See #481 (comment)

The markdown formatter that is used for italics and bold formatting of labels, will also format other markup.
E.g. if the label starts with 4 white-spaces, it will be formatted as code (see comment above) or if starts with a - it will add a bullet point.

Probably makes sense to simply strip all white-space from user-entered text.
We could also strip - and then add it back after formatting with markdown, in case user actually wants " - my label".

[will-moore]

Also, user may actually want text_with_underscores not to be formatted as italics. See https://forum.image.sc/t/bugs-with-labels-in-omero-figures/78829.
We could give user the option to disable/enable markdown formatting for a label, but then useful italics etc wouldn't be possible. Better info on how to \_escape_ markdown might help too.

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/bugs-with-labels-in-omero-figures/78829/2

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/bugs-with-labels-in-omero-figures/78829/3