display improvements

[cmexal]

I have 3 sugggestions: one for the online interface and one for the email alerts.

- When viewing "motion" recordings online, the forward arrow in the middle of the recording is too large (and redundant since theres one below). If you stop the play, the arrow reappears and it obstructs some important details. Please make it smaller, much smaller.

- Email alerts have a large Arlo logo at the beginning so you have to scroll to get to the critical image of the motion that was detected. Please make that smaller for viewing on smaller screens (like a 13" laptop) so you get to the "meat" sooner.

- Imbed a video's timestamp in the name when it's downloaded you have an idea of when the alert occurred.