Registration should be async

[rgs]

On bad network conditions the Registration process may freeze the whole screen hence this should be made async.

See ​http://dev.sugarlabs.org/ticket/1152 for a different suggested approach (for fixing this).

[walter]

Won't make 0.88. This report came from the field. It may be something we want to prioritize for 0.90.

[godiard]

Probably already solved by ​https://github.com/sugarlabs/sugar/commit/7d3f55e03133e1dc624076dd98ada57698cbaf23

quozl, could you confirm please?

[quozl]

thanks for drawing my attention to this ticket, i had not yet found it.

my test case was a register attempt on an ad-hoc network, which hangs for a while.

since #1152 and #1181 were raised, i think the duration of the test case hang has reduced because of underlying changes in the stack.

in my opinion, the duration is now short enough that the progress alert is sufficient, and there is less need to make the registration asynchronous.

however, it would be good to hear from the field. there are other network configurations to be tested.

this ticket can be re-opened when that feedback is available.