Prevent and fix tags starting with a hash-sign
Additional info mentioned in the local issue on github:
If one person makes this mistake the tag gets added to the database. Once it's in the database it goes into the suggested tags drop down. And because the # alphabetized earlier people see the #xxx version first and select it instead of xxx.
I've manually fixed all the tags on answers but they remain in the suggestion drop down.
Two improvements possible:
- Sort the tag suggestions by their popularity instead of alphabetical.
- Do not display tags with zero usage count.