Add numpad emulation in 3D viewport

(cherry picked from commit 4a26e61e89807c0f452f7cb4b6bde590ef39c891)

editor/editor_settings.cpp

@@ -553,6 +553,7 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	_initial_set("editors/3d/navigation/zoom_style", 0);
 	hints["editors/3d/navigation/zoom_style"] = PropertyInfo(Variant::INT, "editors/3d/navigation/zoom_style", PROPERTY_HINT_ENUM, "Vertical, Horizontal");
 
+	_initial_set("editors/3d/navigation/emulate_numpad", false);
 	_initial_set("editors/3d/navigation/emulate_3_button_mouse", false);
 	_initial_set("editors/3d/navigation/orbit_modifier", 0);
 	hints["editors/3d/navigation/orbit_modifier"] = PropertyInfo(Variant::INT, "editors/3d/navigation/orbit_modifier", PROPERTY_HINT_ENUM, "None,Shift,Alt,Meta,Ctrl");

editor/plugins/spatial_editor_plugin.cpp

@@ -1927,6 +1927,13 @@ void SpatialEditorViewport::_sinput(const Ref<InputEvent> &p_event) {
 			return;
 		}
 
+		if (EditorSettings::get_singleton()->get("editors/3d/navigation/emulate_numpad")) {
+			const uint32_t code = k->get_scancode();
+			if (code >= KEY_0 && code <= KEY_9) {
+				k->set_scancode(code - KEY_0 + KEY_KP_0);
+			}
+		}
+
 		if (ED_IS_SHORTCUT("spatial_editor/snap", p_event)) {
 			if (_edit.mode != TRANSFORM_NONE) {
 				_edit.snap = !_edit.snap;