Copy trends before processing them
Add function to `Socket.off`
Bug #1772 Trend rows are sometimes strange heights

Now height is max as can fit on screen by number of trends until
a minimum of 50px high is reached
Merge pull request #92 from TID-Lab/trend-row-height-bug

Trend row height bug
#1408 Review comments by Tom incorporated
Merge branch 'develop' into 1408_better_server_logging