Bug 618143 - Clarify labels in 'Size' tab in GIMPressionist

The "Size" and "Sizes" labels in the GIMPressionist plugin can be more
descriptive, change them to "Size variants" and "Size depends on"
respectively.

plug-ins/gimpressionist/size.c

@@ -105,7 +105,7 @@ create_sizepage (GtkNotebook *notebook)
 
   sizenumadjust =
     gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
-                          _("Sizes:"),
+                          _("Size variants:"),
                           150, -1, pcvals.size_num,
                           1.0, 30.0, 1.0, 1.0, 0,
                           TRUE, 0, 0,
@@ -147,7 +147,7 @@ create_sizepage (GtkNotebook *notebook)
   gtk_box_pack_start (GTK_BOX (box2), box3, FALSE, FALSE, 0);
   gtk_widget_show (box3);
 
-  tmpw = gtk_label_new (_("Size:"));
+  tmpw = gtk_label_new (_("Size depends on:"));
   gtk_box_pack_start (GTK_BOX (box3), tmpw,FALSE,FALSE,0);
   gtk_widget_show (tmpw);