Show preview for "$area" in expr builder, make preview consistent with result

Another partial fix for #9060
#9610: save tolerance of displacement point
pt_PT GUI translations by Nelson Silva
update changelog, add 2.2 api doc to doxygen and merge news updated compiled by
Tim
clean&update translators
update french translation
Merge pull request #1204 from Jean-Roc/traduction_ui

clean&update translators
[TRANSUP] ko by BJ
Add timeout to GetMap for local test server
Add deleting server cache function to local test server
Fix partial labels unit tests and generate new control images
[TRANSUP] pl
Comments and API improvements of simplification (no functional changes)

- moved QgsVectorLayer::SimplifyHint enum to QgsVectorSimplifyMethod
- use QFlags instead of int for hints
- added few notes about simplification being added in 2.2
Merge pull request #1206 from Cracert/i18n

[TRANSUP] pl
Merge pull request #1203 from ahuarte47/Issue_9610

Displacement point: tolerance not saved in project (fixes #9610)
Minor improvements to IT translation, for consistency
[TRANSUP] da by Bo

Signed-off-by: Werner Macho <werner.macho@gmail.com>
russian translation update
raster calculator: exit on error (fix #5075)
Allow LIKE operator in QGIS mapserver's GetFeatureInfo search request (FILTER parameter)