Align image freshness indicators with VERVE

[akhenry]

Is your feature request related to a problem? Please describe.
Image freshness indicators in Open MCT last too long, and blinking is too obnoxious.

Describe the solution you'd like

• Default timing of freshness indicators and should be aligned with VERVE.
• Fade out approach used in VERVE should be considered instead of blinking.

[michaelrogers]

Testing Instructions

Observe that the Imagery view freshness indicator no longer blinks but fades out once sufficiently ripe. In the default configuration, the fade should take 30 seconds from initial freshness indication.

[shefalijoshi]

Not fixed. While the image freshness indicator does fade out, it also fades back in.

[charlesh88]

Verified NOT fixed Testathon 04-25-22:

1. Clicking a past image, then clicking the Play button to resume real-time causes the freshness indicator to reapply, but shouldn't.
2. Camera and Position freshness buttons have lost their color styling.

[michaelrogers]

@charlesh88 - Excellent finds. I have a pr that attempts to address some of these issues. #5116

1. Currently the isNewImage is set to an arbitrary threshold of 5 minutes. In the linked PR, I adjusted the cutoff to be less than the animation duration+delay length. I suspect this may not address the core of the issue, this would prevent the animation from retriggering if it were over the animation threshold. Prior to any changes, any selected image (doesn't have to be most recent) will be marked as fresh if still under the isNewImage threshold.
2. Do camera & position freshness need separate animation values or can they reuse the image freshness indicators values? In the attached PR I have simply reused them, but they could be separate values if desired.

[akhenry]

Per discussion 04/28 positional and camera freshness indicators should never time out.

[charlesh88]

Verified fixed Testathon 4/28/22

[akhenry]

Verified fixed.