Update icon to fit QGIS theme, rename and apply to ConcaveHull also

- Based colours and sizes on mAlgorithmDelaunay.svg
- Renamed from mAlgorithmKNearestConcaveHull.svg to mAlgorithmConcaveHull.svg to be more general
- Applied to ConcaveHull.py also to indicate similarity between algorithms

images/images.qrc

@@ -92,7 +92,7 @@
         <file>themes/default/algorithms/mAlgorithmExtractVertices.svg</file>
         <file>themes/default/algorithms/mAlgorithmExtractLayerExtent.svg</file>
         <file>themes/default/algorithms/mAlgorithmIntersect.svg</file>
-        <file>themes/default/algorithms/mAlgorithmKNearestConcaveHull.svg</file>
+        <file>themes/default/algorithms/mAlgorithmConcaveHull.svg</file>
         <file>themes/default/algorithms/mAlgorithmLineIntersections.svg</file>
         <file>themes/default/algorithms/mAlgorithmLineToPolygon.svg</file>
         <file>themes/default/algorithms/mAlgorithmMeanCoordinates.svg</file>

python/plugins/processing/algs/qgis/ConcaveHull.py

@@ -77,6 +77,12 @@ def name(self):
     def displayName(self):
         return self.tr('Concave hull (using alpha shapes algorithm)')
 
+    def icon(self):
+        return QgsApplication.getThemeIcon("/algorithms/mAlgorithmConcaveHull.svg")
+
+    def svgIconPath(self):
+        return QgsApplication.iconPath("/algorithms/mAlgorithmConcaveHull.svg")
+
     def processAlgorithm(self, parameters, context, feedback):
         layer = self.parameterAsSource(parameters, ConcaveHull.INPUT, context)
         if layer is None:

python/plugins/processing/algs/qgis/KNearestConcaveHull.py

@@ -66,10 +66,10 @@ def displayName(self):
         return self.tr('Concave hull (using k-nearest neighbour algorithm)')
 
     def icon(self):
-        return QgsApplication.getThemeIcon("/algorithms/mAlgorithmKNearestConcaveHull.svg")
+        return QgsApplication.getThemeIcon("/algorithms/mAlgorithmConcaveHull.svg")
 
     def svgIconPath(self):
-        return QgsApplication.iconPath("/algorithms/mAlgorithmKNearestConcaveHull.svg")
+        return QgsApplication.iconPath("/algorithms/mAlgorithmConcaveHull.svg")
 
     def group(self):
         return self.tr('Vector geometry')