Change variable name from dKeyPressed to debugKeyPressed in LangSelector (#1583)

## Description:

Renamed dKeyPressed to debugKeyPressed to better reflect the actual key
used for debug mode activation.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I have read and accepted the CLA agreement (only required once).

src/client/LangSelector.ts

@@ -39,7 +39,7 @@ export class LangSelector extends LitElement {
   @state() private showModal: boolean = false;
   @state() private debugMode: boolean = false;
 
-  private dKeyPressed: boolean = false;
+  private debugKeyPressed: boolean = false;
 
   private languageMap: Record<string, any> = {
     ar,
@@ -83,10 +83,10 @@ export class LangSelector extends LitElement {
 
   private setupDebugKey() {
     window.addEventListener("keydown", (e) => {
-      if (e.key.toLowerCase() === "t") this.dKeyPressed = true;
+      if (e.key.toLowerCase() === "t") this.debugKeyPressed = true;
     });
     window.addEventListener("keyup", (e) => {
-      if (e.key.toLowerCase() === "t") this.dKeyPressed = false;
+      if (e.key.toLowerCase() === "t") this.debugKeyPressed = false;
     });
   }
 
@@ -145,7 +145,7 @@ export class LangSelector extends LitElement {
       }
 
       let debugLang: any = null;
-      if (this.dKeyPressed) {
+      if (this.debugKeyPressed) {
         debugLang = {
           code: "debug",
           native: "Debug",
@@ -264,7 +264,7 @@ export class LangSelector extends LitElement {
   }
 
   private openModal() {
-    this.debugMode = this.dKeyPressed;
+    this.debugMode = this.debugKeyPressed;
     this.showModal = true;
     this.loadLanguageList();
   }