Merge pull request #833 from Cracert/master

Polish translation update
[processing] sextante => processing renaming: fix example provider plugin
translation update: fi by Kari
python: represent NULL attributes as QPyNullVariant
[spatialite] Represent NULL attributes as QVariant/NULL
Instead of QVariant/Invalid
Monkey patch QPyNullVariant to be represented as 'NULL'
[spatialite] uniqueValues() return values instead of strings
translation update: dk by Jacob
correctly unload Globe plugin (fix #4185)
[processing] handle loading empty models in modeler (fix #8153)
More untranslatable string fixes in vector layer properties.
Merge pull request #835 from artfwo/more-strings-fixes-in-vector-layer-properties

More untranslatable string fixes in vector layer properties.
typo fixes for danish language
cleanup
[processing] fix html in error handler text
latest danish translation update
labeling, vector style