Creating wiki pages with only whitespace should be disallowed

When a new wiki page is created and the title contains just a blank space , the path becomes a dash (-). This results in multiple problems:

1. Trying to create the page results in an WikiPageInvalid error.
2. Despite the error, the page is actually created, but you cannot go to it by clicking the link in the sidebar since empty spaces are not clickable

video

Proposal

Creating pages with only whitespace in the title should be disallowed.