preference: Rename show app unread badge setting.

The original wording was found to be confusing, see
https://chat.zulip.org/#narrow/channel/16-desktop/topic/.22app.20unread.20badge.22/near/1993426
for more details.

app/renderer/js/pages/preference/general-section.ts

@@ -56,7 +56,7 @@ export function initGeneralSection({$root}: GeneralSectionProperties): void {
         </div>
         <div class="setting-row" id="badge-option">
           <div class="setting-description">
-            ${t.__("Show app unread badge")}
+            ${t.__("Show unread count badge on app icon")}
           </div>
           <div class="setting-control"></div>
         </div>

public/translations/en.json

@@ -128,9 +128,9 @@
 	"Settings": "Settings",
 	"Shortcuts": "Shortcuts",
 	"Show app icon in system tray": "Show app icon in system tray",
-	"Show app unread badge": "Show app unread badge",
 	"Show desktop notifications": "Show desktop notifications",
 	"Show sidebar": "Show sidebar",
+	"Show unread count badge on app icon": "Show unread count badge on app icon",
 	"Spellchecker Languages": "Spellchecker Languages",
 	"Start app at login": "Start app at login",
 	"Switch to Next Organization": "Switch to Next Organization",