convene plugin auto-locking

• Usability

I think it all started when I was filling my availability row. This requires scrolling right, so I did not see the left-hand "save" icon. I saw a similar icon in the bottom and I clicked it (thinking "how clever, a floating save icon").
But it made me change pages to the calendar item of the top-selected time (ooops!)
Then when I came back to the page, no availability was shown on my row (obviously) and I could not edit again (there was probably a lock) nor delete my whole line either.
Later on, I came back and I could fill availabilty agin and save.

Then I tried to add a new participant "Jyhem.logger" for confirming the issue
Then "Jyhem" was showing as if no availability was selected
But when I edited the line all was correctly selected. Just not shown
Also, I could not delete "Jyhem.logger" line

It was like there was some interference between the "Jyhem" and the Jyhem.logger" lines.

Then I edited the whole page and saw Jyhem had the proper selections. I cancelled edition of the page (no change).
Then all was good : I could delete "Jyhem.logger" and see the "Jyhem" availability
That's it

This bug has been demonstrated on show2.tikiwiki.org

Please demonstrate your bug on show2.tikiwiki.org