UI: Add Quality control

[gunta]

Reasons:

• Old devices CPU are too slow (Slow JPEG encoding)
• STF->Client Network speed may be too slow (Poor Wifi)
• Client browser may be too slow (Mobile browser / Old PC)

Ways to do it:

• Manual quality control: Low/Med/High
• Auto quality control: Measure each blob loading time
  Have 3 L/M/H breakpoints for when the value goes below

What to adjust:

• Image size
• JPEG image quality

[sorccu]

I think it would be easier to understand if it was a slider between speed and quality, rather than having 3 levels to choose from. Then it would also be clearer why the option exists.

[qarulz]

What about this issue?