QOL: MIH Authentication Package performance improvements

Frontend/lib/mih_packages/mih_authentication/mih_auth_forgot_password.dart

@@ -14,6 +14,13 @@ class MihAuthForgotPassword extends StatefulWidget {
 
 class _MihAuthForgotPasswordState extends State<MihAuthForgotPassword> {
   int _selcetedIndex = 0;
+  late final MihForgotPassword _forgotPassword;
+
+  @override
+  void initState() {
+    super.initState();
+    _forgotPassword = MihForgotPassword();
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -59,9 +66,8 @@ class _MihAuthForgotPasswordState extends State<MihAuthForgotPassword> {
   }
 
   List<Widget> getToolBody() {
-    List<Widget> toolBodies = [
-      MihForgotPassword(),
+    return [
+      _forgotPassword,
     ];
-    return toolBodies;
   }
 }

Frontend/lib/mih_packages/mih_authentication/mih_auth_password_reset.dart

@@ -19,6 +19,13 @@ class MihAuthPasswordReset extends StatefulWidget {
 
 class _MihAuthPasswordResetState extends State<MihAuthPasswordReset> {
   int _selcetedIndex = 0;
+  late final MihResetPassword _resetPassword;
+
+  @override
+  void initState() {
+    super.initState();
+    _resetPassword = MihResetPassword(token: widget.token);
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -67,11 +74,8 @@ class _MihAuthPasswordResetState extends State<MihAuthPasswordReset> {
   }
 
   List<Widget> getToolBody() {
-    List<Widget> toolBodies = [
-      MihResetPassword(
-        token: widget.token,
-      ),
+    return [
+      _resetPassword,
     ];
-    return toolBodies;
   }
 }

Frontend/lib/mih_packages/mih_authentication/mih_authentication.dart

@@ -17,6 +17,16 @@ class MihAuthentication extends StatefulWidget {
 }
 
 class _MihAuthenticationState extends State<MihAuthentication> {
+  late final MihSignIn _signIn;
+  late final MihRegister _register;
+
+  @override
+  void initState() {
+    super.initState();
+    _signIn = MihSignIn();
+    _register = MihRegister();
+  }
+
   @override
   Widget build(BuildContext context) {
     return MihPackage(
@@ -32,8 +42,10 @@ class _MihAuthenticationState extends State<MihAuthentication> {
   }
 
   List<Widget> getToolBody() {
-    List<Widget> toolBodies = [MihSignIn(), MihRegister()];
-    return toolBodies;
+    return [
+      _signIn,
+      _register,
+    ];
   }
 
   List<String> getToolTitle() {