Zoom enhancement

[guest]

• please support also the right mouse button four Zoom out. I is so convenient to zoom with the right/left mouse button.
• if the picture is larger then the current visible area AND the mouse is used for zooming then please center the position the mouse points to. This makes navigation more easy.

Have a look at PMView this works the way i like....

Thanks

[Eugene Romanenko]

Unlike PMView, we use Ctrl-Click for zoom out, like in Acrobat Reader.

[Silvan Scherrer]

the way PMVIEW works is really good, but also the current way should be preserved.

[rbri]

done