loader.js: Remember a request's method

public/js/icinga/loader.js

@@ -139,6 +139,7 @@
             req.fail(this.onFailure);
             req.complete(this.onComplete);
             req.autorefresh = autorefresh;
+            req.method = method;
             req.action = action;
             req.addToHistory = true;
             req.progressTimer = progressTimer;