Issue: Problematic creation of a Prefixed Page from a Prefixed Link

To recreate

1. Use a page to create a wiki link to a non-existing prefixed page, say A:B, where A is a predefined Prefix in Prefix Manager, but the page B-in-A does not yet exist.
2. Click on the resulting rendered (and red) link from said page
3. On the "Error"/not exists page, click "Create"
4. Notice: the title text box is prepopulated with "A:B", whereas the Prefix dropdown is default/no selection
5. Leave the title text box and dropdown as-is, and fill in the form otherwise
6. Click "Create A New Page", ie save
7. Notice: the title of the resulting page is itself the string "A:B", as in: not "B" in the prefix "A", that is page "B" is not created with prefix "A", but title "A:B"


I assert: this is problematic.

Expectation(?)/Suggestion: At #4, the prefix dropdown would have "A" selected as default, and the textbox would have "B". Basically, resulting in form defaults on "title" which make for a proper B-in-prefix-A page creation, as derived from the link/URL that brought you here?

The end-user, manual workaround here is to select "A" in the dropdown, then remove "A:" before "B" in the textbox... error-prone and problematic, at best..