It seems that TAB navigation doesn't always cycle through SYSE's KCM list. It should. It should also be very visible to the user that an item in the list has focus. Right now, it doesn't seem to be the case. Maybe the upcoming blue border in breeze ocean can help this. I tried going through the inputs KCMs and cycled through the KCMs themselves but was unable to tab into the KCM list to select a different KCM within the input category. Neither was I able to go back a step using TAB. The expectation is that TAB navigation cycles through all visible elements on the window presented to the user.
*** This bug has been marked as a duplicate of bug 404065 ***