Cannot import a page that has ":" in the page name

Steps to follow to reproduce:

• Create a new page & make sure it has ":" in the name (e.g. Page name: page name)
• Save the page and export it as XAR
• Hover over "XWiki" and click on "Administer Wiki"
• Click on "Import"
• Upload the page you just exported
• Click on the page name
• Import the page

Result: The page is skipped due to the presence of ":" in the page name.