* Make enum selector generic
* Refactor ImportCsvPage to support tooltips
* Improve csv import defaults
* Unify import pages
* Improve import page styling
* Fix life cycle issue with import properties
* Remove size constraints to fix scrollbar styling
* Add help strings and urls to csv import page
* Show ErrorPage on ImportPage error
* Fix escaping of import path
* Unify ImportPage and ImportLogPage
* Apply suggestions from code review (dae)
* Fix import progress
* Fix preview overflowing container
* Don't include <br> in FileIoErrors (dae)
e.g. 500: Failed to read '/home/dae/foo2.csv':<br>stream did not contain valid UTF-8
I thought about using {@html ...} here, but that's a potential security issue,
as the filename is not something we control.
