XWIKI-12267 we have a new Tree in our Import UI.
1. Icons: we are displaying space icon, instead of page icon
2. Naming: we are displaying WebHome instead of spaceTitle
3. Translations: we should display a translations marker in order to differentiate the pages;
4. Selection: we have checkboxes marked + background color. I think one method of marking the selection is enough.
5. Use the same font-size for all the entries (backup is larger)
6. Use 'page' term instead of 'document'