Performance improvement PersonaBar pages treeview on Expand/Collapse

[nadeem-akhtar-nu]

Fix bug #3532

Summary

• Update store method was repeating called for each tree view node with the same parameters.
• Optimize call to this update store method once per process as parameters remains constant.

Measurements

Action	Baseline (ms)	Baseline avg.	Improve (ms)	Improve avg.	Improvement
Expand node	59,358	59,227.80	6,032	5,685.60	10.42 X
--	59,573		5,512
--	61,184		5,631
--	58,579		5,775
--	57,445		5,478
Collapse node	55,476	53,868.40	825	754.20	71.42 X
--	52,227		695
--	54,076		716
--	54,947		794
--	52,616		741

[david-poindexter]

This looks good to me - thanks @nadeem-akhtar-nu