Improve editing of min/max particle properties

doc/classes/ParticleProcessMaterial.xml

@@ -9,6 +9,14 @@
 	<tutorials>
 	</tutorials>
 	<methods>
+		<method name="get_param" qualifiers="const">
+			<return type="Vector2" />
+			<param index="0" name="param" type="int" enum="ParticleProcessMaterial.Parameter" />
+			<description>
+				Returns the minimum and maximum values of the given [param param] as a vector.
+				The [code]x[/code] component of the returned vector corresponds to minimum and the [code]y[/code] component corresponds to maximum.
+			</description>
+		</method>
 		<method name="get_param_max" qualifiers="const">
 			<return type="float" />
 			<param index="0" name="param" type="int" enum="ParticleProcessMaterial.Parameter" />
@@ -37,6 +45,15 @@
 				Returns [code]true[/code] if the specified particle flag is enabled. See [enum ParticleFlags] for options.
 			</description>
 		</method>
+		<method name="set_param">
+			<return type="void" />
+			<param index="0" name="param" type="int" enum="ParticleProcessMaterial.Parameter" />
+			<param index="1" name="value" type="Vector2" />
+			<description>
+				Sets the minimum and maximum values of the given [param param].
+				The [code]x[/code] component of the argument vector corresponds to minimum and the [code]y[/code] component corresponds to maximum.
+			</description>
+		</method>
 		<method name="set_param_max">
 			<return type="void" />
 			<param index="0" name="param" type="int" enum="ParticleProcessMaterial.Parameter" />

editor/editor_inspector.cpp

@@ -149,6 +149,9 @@ void EditorProperty::_notification(int p_what) {
 					if (c->is_set_as_top_level()) {
 						continue;
 					}
+					if (!c->is_visible()) {
+						continue;
+					}
 					if (c == bottom_editor) {
 						continue;
 					}

editor/editor_node.cpp

@@ -146,6 +146,7 @@
 #include "editor/plugins/mesh_library_editor_plugin.h"
 #include "editor/plugins/node_3d_editor_plugin.h"
 #include "editor/plugins/packed_scene_translation_parser_plugin.h"
+#include "editor/plugins/particle_process_material_editor_plugin.h"
 #include "editor/plugins/root_motion_editor_plugin.h"
 #include "editor/plugins/script_text_editor.h"
 #include "editor/plugins/text_editor.h"
@@ -6974,6 +6975,10 @@ EditorNode::EditorNode() {
 		Ref<EditorInspectorVisualShaderModePlugin> smp;
 		smp.instantiate();
 		EditorInspector::add_inspector_plugin(smp);
+
+		Ref<EditorInspectorParticleProcessMaterialPlugin> ppm;
+		ppm.instantiate();
+		EditorInspector::add_inspector_plugin(ppm);
 	}
 
 	editor_selection = memnew(EditorSelection);