18.x Structures can create bad pages names

• Error

A user typo whilst creating a structure can create a new page which then isn't (easily) accessed.

Whilst creating a new structure and adding pages with aliases using the "Tree" feature, if hyphen space greater-than rather than simply hyphen greater-than is entered the new page is created without an alias but with a longer that expected page name.

For example
Test_01 -> Page1 creates new page called Test_01 and alias Page1 as expected.
But
Test_02 - > Page2 creates a new page called "Test_02 - > Page2" with no alias.

Accessing this page and removing it is challenging )

(Can't currently create a show instance for you, no database connection available, but I can reproduce this on the demo 18x/system)

Using the Structures "next page" button from page Test_01 causes a wiki error "Page not found" for "Test_02 - Page2" (sic without greater-than sign).

Likewise wikilink from toc generated on pages within the structure also results in "Page not found".

Adding the plugin listpages with options find="Test_0" to the root of the structure shows the pages as expected.

Note the wikilink URLs generated by toc and listpages are different, but wikilink from listpages also results in the same "Page not found error" for the same page "Test_02----Page2"

This bug has been demonstrated on show2.tiki.org

Please demonstrate your bug on show2.tiki.org