Repeat frequency of alarm sounds

[dsshad]

Currently the alarm sounds seem to be playing repeatedly until one open the message page or comabt page etc. In my opinion it's mostly not wanted. If one can't react to an event, it's not neccessary to play the sound all the time - at least not for all sounds.

It would be good to have the ability to set the repeat frequency per alarm sound.

An example is in the second screenshot of this issue: #57

Here the repeat frequency is possible for combat related alarm sounds. Could be extended to all.

0 = repeatedly
1 = only once
X = x time

[Tsunder]

Also having the same options for the notification toast would be good.