Added Timestamp info, adjusted humidity sensor

Added timestamp info to Light switch, fan switch, humidity sensor events.  Added to status page.
Reverted last change to the humidity sensor trend (changing trend at 0.5% was too sensitive; reverted back to 1%.)  Note Status page will show trend is "Stay" if sensor only changes 1% up or down; however a shower event, I would think should show more than 1% change, but only testing will tell. If you wish to play with this value, it's located at lines 300 & 301.