Reworked visualization of selected triangles by seed fill and bucket fill inside the multi-material painting gizmo. Now is drawn boundary around a selected area, and also all triangles inside the selected area are drawn with a darker color.

resources/shaders/mm_contour.fs

@@ -0,0 +1,6 @@
+#version 110
+
+void main()
+{
+    gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
+}

resources/shaders/mm_contour.vs

@@ -0,0 +1,6 @@
+#version 110
+
+void main()
+{
+    gl_Position = ftransform();
+}