Reduce excessive pulsing of save changed dialog

It's important to pulse the save changes prompt to get the users attention but it's hard to click the save button while it's flashing.

The prompt flashes 6 times which is a bit excessive, especially on client devices/browsers that do not have accelerated rendering of opacity effects. For example, on my main PC the flashing ends in ~3-4 seconds, but takes almost twice as long on my laptop.