Fix rebinded keys (#4175)

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**Add approved & assigned issue number here:**

Resolves #4174 

## Description:

I have fixed the rebinding of the keys for the build menu modifier and
the emoji menu modifier in the settings so that they actually work.
And cleaned up the code

## 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

## Please put your Discord username so you can be contacted if a bug or
regression is found:

tktk1234567

src/client/HelpModal.ts

@@ -285,7 +285,7 @@ export class HelpModal extends BaseModal {
                   <tr class="hover:bg-white/5 transition-colors">
                     <td class="py-3 pl-4 border-b border-white/5">
                       <div class="inline-flex items-center gap-2">
-                        ${this.renderKey(keybinds.modifierKey)}
+                        ${this.renderKey(keybinds.buildMenuModifier)}
                         <span class="text-white/40 font-bold">+</span>
                         <div
                           class="w-5 h-8 border border-white/40 rounded-full relative"
@@ -306,7 +306,7 @@ export class HelpModal extends BaseModal {
                   <tr class="hover:bg-white/5 transition-colors">
                     <td class="py-3 pl-4 border-b border-white/5">
                       <div class="inline-flex items-center gap-2">
-                        ${this.renderKey(keybinds.altKey)}
+                        ${this.renderKey(keybinds.emojiMenuModifier)}
                         <span class="text-white/40 font-bold">+</span>
                         <div
                           class="w-5 h-8 border border-white/40 rounded-full relative"