Allow JS tracker to change heart beat wait interval exponentially #8213
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Adds two parameters to
enableHeartBeatTimer()
in the JS tracker: the delay multiplier and the maximum delay. After each ping, the delay is multiplied by the multiplier (so if 2 is used, the delay doubles), until it reaches or exceeds the maximum delay. Then that delay is used the whole time.Useful to reduce load for websites/webapps where users view a single page for a long time. A website that streams video, is an example of such a website.
Refs #8069
CC @mattab