Preview resize 12319

[will-moore]

The Preview viewport should now resize when the right panel is resized.

To test:

• Browse to an Image and select the "Preview" tab on right.
• Resize the right panel, using the drag handle.
• The viewport should resize when you stop the drag (larger and smaller).
• When a new image is selected and loaded into viewport, should still fit current size.
• Various combinations of change in panel size, tab selection and image selection should "just work".

[mtbc]

Seems to work fine, good to merge.

(Small RFE I noticed: tall, thin images are shrunk more than necessary so as to fit in the square view port thing -- it narrows as necessary but also shrinks vertically when maybe it needn't.)

[atarkowska]

Works nicely although I couldn't resize window on IE8 & 9, only 10

[will-moore]

Seems to be mostly working in IE8 for me. OK to merge?

[atarkowska]

that seems to be true for regular image, but not big image

[will-moore]

Ah, OK. Seems that neither left nor right panels can be resized once a Big Image is displayed in Preview panel in IE8 (needs a full page refresh to fix). But this bug is not related to this PR. Can we merge now and fix that later?

[atarkowska]

ok, np, please create a ticket for that

[will-moore]

Ticket created https://trac.openmicroscopy.org.uk/ome/ticket/12412

[joshmoore]

Thanks all. Merging.

[atarkowska]

--rebased-to #2762