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

[Vlad Zagorodniy]

Restricted Application edited projects, added KWin; removed Plasma.

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, iodelay, bwowk, ZrenBot, progwolff, lesliezhai, ali-mohamed, 
hardening, jensreuterberg, abetts, sebas, apol