fix linter and do not require reload page if option was changed

extensions-builtin/canvas-zoom-and-pan/javascript/zoom.js

@@ -839,12 +839,13 @@ onUiLoaded(async() => {
         document.addEventListener("keydown", handleMoveKeyDown);
         document.addEventListener("keyup", handleMoveKeyUp);
 
+
         // Prevent firefox to open toolbar on pressing alt
-        if (hotkeysConfig.canvas_hotkey_zoom === "Alt") {
         let isAltPressed = false;
 
         function handleAltKeyDown(e) {
             if (!activeElement) return;
+            if (hotkeysConfig.canvas_hotkey_zoom !== "Alt") return;
             if (e.code === "AltLeft" || e.code === "AltRight") {
                 isAltPressed = true;
             } else {
@@ -853,6 +854,7 @@ onUiLoaded(async() => {
         }
 
         function handleAltKeyUp(e) {
+            if (hotkeysConfig.canvas_hotkey_zoom !== "Alt") return;
             if (isAltPressed) {
                 e.preventDefault();
             }
@@ -861,7 +863,6 @@ onUiLoaded(async() => {
 
         document.addEventListener("keydown", handleAltKeyDown);
         document.addEventListener("keyup", handleAltKeyUp);
-        }
 
 
         // Detect zoom level and update the pan speed.