D9848: Updated the blur method to use the more efficient dual kawase blur algorithm.

[Diego Gangl]

Restricted Application edited projects, added Plasma; removed KWin.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D9848

To: anemeth, #plasma, #kwin
Cc: zzag, anthonyfieroni, mart, davidedmundson, fredrik, ngraham, plasma-devel, 
kwin, #kwin, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, 
abetts, sebas, apol