Gate the new resizing behavior behind new option

This interferes with resizing plugins using resize handles, and since it
only helps with two buggy plugins this seems like the best solution
here.

src/plugin/bridges/common.h

@@ -255,6 +255,9 @@ class PluginBridge {
                 "hack: pipes disabled, plugin output will go to \"" +
                 config.disable_pipes->string() + "\"");
         }
+        if (config.editor_coordinate_hack) {
+            other_options.push_back("editor: coordinate hack");
+        }
         if (config.editor_force_dnd) {
             other_options.push_back("editor: force drag-and-drop");
         }