Change drop shadow to cover all sites

[pkoerner81929]

Applying drop shadows on light/white images is too soft/light. Borders are almost invisible, so placing these captures on white background (paper) looks irritating.

Screenshot 1: left (ksnip), right (other drop shadow filter)
Screenshot 2: ksnip github dropshadow version (nice).

[DamirPorobic]

I'll see what I can do.

[DamirPorobic]

Something like this?

[DamirPorobic]

@pkoerner81929 how does this look?

[pkoerner81929]

Looks good. Should also work with white/gray on white etc.

[DamirPorobic]

I'll tr to bring this change into the next 1.9.0 minor release

[DamirPorobic]

Done, you can check it out in the continuous build.