[Feature request] Show dimensions in statusbar for pasted images (and by extension screenshots)

[isf63]

Is your feature request related to a problem? Please describe.

It would be nice if screenshots and pasted images had their dimensions shown in the statusbar.

Because screenshots are pasted in, it is the same function. See:

lximage-qt/src/screenshotdialog.cpp

Line 225 in 9f42984

window->pasteImage(image);

Describe the solution you'd like

"Size: W×H" shown in the statusbar. Because there is no filename, "Path:" wouldn't make sense.

Context

For screenshots this may be useful, to get an understanding of the dimensions. I doubt many people paste from clipboard into LXImage-Qt, but it happens to be the same code path. It any case it is valuable information, if only occasionally useful.