v1.4.0

[taj-ny]

The only issue is that blur region is rounded even if it doesn't touch window corners. I'll add a workaround and then v1.4.0 should be ready.

Changelog (WIP)

• blur: added the ability to adjust the brightness, saturation and contrast
• blur: added a workaround for blur disappearing during the maximize animation
• force-blur: blur region of menus and tooltips with an existing region will not be overridden anymore (Kvantum shadows)
• force-blur: added a workaround for the blur region sometimes disappearing
• kcm: added the about page
• rounded-corners: improved the implementation, now it's much less simpler and less prone to bugs (there probably won't be a noticeable performance improvement)
• rounded-corners: radii can now be fractional
• static-blur: moved to its own tab (previously called "Draw image behind windows")
• static-blur: the desktop wallpaper can now be used as the texture
• static-blur: the texture can now be blurred using the same algorithm used for normal blur (this is only done when the texture is created)
• static-blur: added the ability to use normal blur for windows with another window behind
• static-blur: improved support for HDR screens (needs to be improved further)