Fixing some Tooltips regarding to #8147
translation update id by Trias
const-correctness for QgsGeometry
QgsVectorLayerFeatureIterator: Don't worry about concurrent edits
An iterator will always use the data from the edit buffer which was
valid, at the time the iterator was created. Therefore, there are no
more problems with randomly disappearing or changing features while
iterating
translation update: fi by Kari
[QGIS-Server] The parameter PROPERTYNAME does not filter attributes

Bug #8155
In the OGC standard, the parameter PROPERTYNAME is ussed to filter attributes in the request getFeature. In version 1.8 this parameter works. Because of changes in the vector API, this parameter does not filter attribute.
[QGIS-Server] WFS Filter : send empty data instead of XML error when no feature found

Bug #8123
When a getFeature request has a FILTER parameter, and when no data
corresponds, QGIS answer sometimes with :
<ServiceExceptionReport version="1.3.0">i
  <ServiceException code="RequestNotWellFormed">No feature found error messages: .</ServiceException>
</ServiceExceptionReport>
It would be better to send back an empty GML (Or GeoJSON) instead.
followup 55135d600
german translation update
fix #8159
[Plugin Installer] Follow up 4ecf3ebd0 (use QgsNetworkManager in plugin installer)
[Plugin Manager] Display proper plugin count
Follow up 24bbd485a
[Plugin Installer] Simplify plugin reloading
[Plugin Installer] Fix #8111. Better repository error handling.
follow up 86bebab3ce
[Plugin Installer] Fix metadata description, add "about" tag, prefer remote plugin name.
follow up 86bebab3ce
[Plugin Installer] Fix #8080
[Plugin Manager] better formatting of plugin details