[processing] add some missing icons for the data management tools menu

Author: nirvn

images/images.qrc

@@ -87,9 +87,11 @@
         <file>themes/default/algorithms/mAlgorithmIntersect.svg</file>
         <file>themes/default/algorithms/mAlgorithmLineIntersections.svg</file>
         <file>themes/default/algorithms/mAlgorithmMeanCoordinates.svg</file>
+        <file>themes/default/algorithms/mAlgorithmMergeLayers.svg</file>
         <file>themes/default/algorithms/mAlgorithmMultiToSingle.svg</file>
         <file>themes/default/algorithms/mAlgorithmSimplify.svg</file>
         <file>themes/default/algorithms/mAlgorithmSingleToMulti.svg</file>
+        <file>themes/default/algorithms/mAlgorithmSplitLayer.svg</file>
         <file>themes/default/algorithms/mAlgorithmSymmetricalDifference.svg</file>
         <file>themes/default/algorithms/mAlgorithmUnion.svg</file>
         <file>themes/default/cap_flat.svg</file>

images/themes/default/algorithms/mAlgorithmMergeLayers.svg

@@ -27,7 +27,8 @@
 
 import os
 
-from qgis.core import (QgsProcessingUtils,
+from qgis.core import (QgsApplication,
+                       QgsProcessingUtils,
                        QgsFeatureSink,
                        QgsProcessingParameterFeatureSource,
                        QgsProcessingParameterField,
@@ -71,6 +72,12 @@ def initAlgorithm(self, config=None):
                                                                   self.tr('Output directory')))
         self.addOutput(QgsProcessingOutputMultipleLayers(self.OUTPUT_LAYERS, self.tr('Output layers')))
 
+    def icon(self):
+        return QgsApplication.getThemeIcon("/algorithms/mAlgorithmSplitLayer.svg")
+
+    def svgIconPath(self):
+        return QgsApplication.iconPath("/algorithms/mAlgorithmSplitLayer.svg")
+
     def name(self):
         return 'splitvectorlayer'
 

images/themes/default/algorithms/mAlgorithmSplitLayer.svg

@@ -35,6 +35,8 @@ class QgsMergeVectorAlgorithm : public QgsProcessingAlgorithm
 
     QgsMergeVectorAlgorithm() = default;
     void initAlgorithm( const QVariantMap &configuration = QVariantMap() ) override;
+    QIcon icon() const override { return QgsApplication::getThemeIcon( QStringLiteral( "/algorithms/mAlgorithmMergeLayers.svg" ) ); }
+    QString svgIconPath() const override { return QgsApplication::iconPath( QStringLiteral( "/algorithms/mAlgorithmMergeLayers.svg" ) ); }
     QString name() const override;
     QString displayName() const override;
     QStringList tags() const override;