Usability: GUID tooltips are not useful to most users

[MikeBishop]

The GUID which appears when the mouse cursor hovers over a transaction is presumably useful when debugging sync. That's a vanishingly small fraction of users. I'd suggest the GUID be hidden without enabling dev tools or otherwise specifically seeking out advanced options.

Instead, perhaps the tooltip should display the full text of whatever it's over if it's too wide for its column, and not appear otherwise.