Very slow to update bars, nodes and panels

[rwemay]

Description:

When using UpdateOnly pushing bars, nodes and panels, the process is very slow - particularly with a large number of objects. The view is refreshing each time which is probably slowing things down.

Steps to reproduce:

Push a large number of bars using updateOnly.

Expected behaviour:

Suggest adding multioperation to the bar com calls, and implementing the global IsVisible and IsInteractive to speed up bar updating. I don't think there is any way to avoid the com access unfortunately.

Test file(s):

[IsakNaslundBh]

This is related to #251 which I hope to be able to solve in the next sprint.

Would call this a feature rather than a bug, will re-label if that is ok with you @rwemay