Indicate that an image is being loaded/processed by importimage

[mrgenie]

when I load Geotiff images using the plugin - it's done loading the image and the memory it needs is being claimed - yet for another few seconds the CPU usage is still high >10% (up to as much as 60%) while still processing the image before it drops again below 5%

During this time it's >10%, JOSM is lagging severely..

The only way to know it's done loading properly - is keep every now and then try to shake the mouse..

it would be convenient - apart from opening the task manager - if the plugin would just show a spinning waiting icon while its still busy processing - so the use knows when it's done.

Again - not a big issue as one can just trial and error or open the task manager, that's what I open to see when the plugin is done - but better is just a spinning icon.

[skyper]

@mrgenie: Please, do not set Milestone in general when creating new tickets and only use Version for core tickets, thanks.