code changes to improve graph functionality, as per code reviews by brett. Bug of graph delay to be finished.
Merge branch 'sachin2' into sachin
Merge branch 'sachin' of github.com:bvds/LaitsV3 into sachin
Merge branch 'master' into sachin
Merge branch 'master' into sachin2
Merge branch 'sachin' into sachin2
fix bug 2370
Merge branch 'sachin' of https://github.com/bvds/LaitsV3 into sachin
Merge branch 'sachin' of github.com:bvds/LaitsV3 into sachin
Merge branch 'sachin' into sachin2
fix bug 2370
Fix to bug #2370
Cherry-picked from commit 82f8f3a546401ae33370655b3e832d3c055819ee
Also some minor cleaning up of other code.
Fixing time step in introductory problems, removing duplicate nodes in prob 108.
Merge branch 'master' of https://github.com/bvds/LaitsV3
Merge branch 'master' into sachin2
Merge branch 'sachin2'
Further fixes to problem 108.
Merge branch 'master' of https://github.com/bvds/LaitsV3
Adding OK button in the Message Box
Adding OK Button -1