Infoboxes are no longer so eager to hide when moving the mouse out and

back onto a row, and are less likely to disappear when trying to mouse

over the infobox. The delays have been increased a bit to keep infoboxes

on-screen longer during mouse movement and to not pop up so quickly when

generally moving the mouse down the datagrid.
There's also a fix for an extra timer that wasn't cleared on mouseleave

events, and one that wasn't cleared when mousing over the target

element.
This does a lot to improve the interaction on the Dashboard.

Tested moving the mouse back-and-forth between a target row and the

review request infobox, including making a path over neighboring rows.

Verified that the infobox remained on-screen for a longer period of time

and didn't go away and then come back.
Tested moving the mouse from the infobox to a separate target row. The

infobox remained on-screen but then transitioned to the new contents.