Refactor on datatable prerender

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@10409 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Merge branch 'master' into 3.5.x
Merge branch 'master' into 3.5.x
Merge branch 'master' into 3.5.x
Merge branch 'master' into 3.5.x
Merge branch 'master' (early part) into 3.5.x
Prevent sibling drop

git-svn-id: https://primefaces.googlecode.com/svn/primefaces/trunk@10309 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Merge branch 'master' into 3.5.x
Tagged 3.5.22-UR (Unofficial Release).
Next maintenance iteration for 3.5.x