Release 4.4.1: update to latest bridgestyle, update docs

docs/source/publish.rst

@@ -8,17 +8,18 @@ Supported layer types
 
 |app_name| supports the following layer types:
 
--   Vector layers from any spatial data source
--   Raster layers from any spatial data source
+-   Standard vector layers (i.e. a [QgsVectorLayer](https://api.qgis.org/api/classQgsVectorLayer.html#details) object)
+-   Standard raster layers (i.e. a [QgsRasterLayer](https://api.qgis.org/api/classQgsRasterLayer.html#details) object)
 -   Layer groups
 
 .. note::   You may experience that even if your layer is of one of the types listed above,
             |short_name| still does not seem to support it. This could be the case if:
 
             -   The layer data source is non-spatial (e.g. a CSV)
+            -   The layer is a third-party plugin layer (i.e. a [QgsPluginLayer](https://api.qgis.org/api/classQgsPluginLayer.html#details) object)
             -   The layer does not have a CRS (coordinate reference system) or it is invalid
-            -   The layer is corrupt for some reason
-            -   The layer is temporary (i.e. stored in memory)
+            -   The layer data source is broken or missing
+            -   The layer is virtual and stored in memory (i.e. not on disk)
             -   The layer is a web map layer (e.g. WMS)
 
             In most of the cases you should be able to easily fix these issues, for example by exporting

docs/source/supported_symbology.rst

@@ -37,7 +37,8 @@ Expressions
 		x, y, concat, substr, lower, upper, replace, exterior_ring, 
 		intersects, overlaps, touches, within, relates, crosses, 
 		disjoint, geom_from_wkt, perimeter, union, acos, asin, atan,
-		atan2, sin, cos, tan, ln, title, translate, min, max 
+		atan2, sin, cos, tan, ln, title, translate, min, max,
+		to_int, to_real, to_string
 
 | Some function parameters accept expressions, but this is not always supported by |short_name| when converting to SLD.
 | This applies to the following parameter types:
@@ -322,4 +323,4 @@ Supported renderers
 - Single band color
 - Single band pseudo color
 - Multi-band color
-- Paletted
+- Paletted