Take 3 on the belt performance (+ tslint fixes)

src/js/core/modal_dialog_forms.js

@@ -19,7 +19,7 @@ export class FormElement {
         abstract;
     }
 
-    focus(parent) {}
+    focus() {}
 
     isValid() {
         return true;

src/js/core/polyfills.js

@@ -72,6 +72,7 @@ function objectPolyfills() {
     }
 
     if (!Object.entries) {
+        // @ts-ignore
         Object.entries = function entries(O) {
             return reduce(
                 keys(O),

src/js/core/utils.js

@@ -405,8 +405,6 @@ export function findNiceValue(num) {
     return Math_round(niceValue * 100) / 100;
 }
 
-window.fn = findNiceValue;
-
 /**
  * Finds a nice integer value
  * @see findNiceValue