[JHV 2.1] JPIP queries

[Daniel Mueller]

- Load a large AIA JPX file (~1000 frames) and start playing it.
- Move to a new WOI and stop the movie.
 --> One would expect the remaining quality layers for the current frame to be downloaded now, but this (at least in most cases I have tried) does not happen (the image remains blurry).

- Step to the next frame using the arrow key.
 --> The WOI his frame appears initially in the same low quality as the previous one, but gets updated to the best quality available quickly, which is the expected behavior.

So it looks like the only way right now to make sure a WOI is displayed at the highest available quality is to step into it (instead if just stopping there) or to pan the frame slightly. However, it would be nice if the client took care of this automatically.