Under a Device -> Configuration, if I click "Import configuration" and "Import the current default configuration" followed by "Import" button the UI dialogue box seems to crash / become flaky and it just shows an empty configuration (even though I have checked the box to save a configuration earlier).
I tested with both Firefox and Chrome (on current hosted Mender), so pretty sure it is a UI bug.
At the same time I would like to propose a usability enhancement while working in this area, as discovered during user testing of the prototype and again while demoing it:
Instead of "hiding" the import default configuration under "Import configuration", simply have a button to "Fill default configuration" at the top level. This would align conceptually with having a "Save as default" checkbox at the top level as well and have it more easily accessible.