Update html layout

- add messages fragment
  - extract error and success message list from edit.html
  - extract error message list from create.html
  - add messages.html

- update edit account
  - update AccountController
    - update postEditAccount for validation
    - update getEditAccount for roleGroups
  - update validation for AccountForm for edit
  - add EditGroup
  - update Account.Response.toAccountForm()
  - update edit.html

- update create account
  - update AccountController
    - update postCreateAccount for validation
    - update getCreateAccount for role group
  - add validation to AccountForm
  - add PasswordMatchValidator
  - add annotation PasswordMatch
  - add CreateGroup
  - add temporary getRoles() in AccountRegistryService
  - update AccountForm.toAccountRequest() in Mapping
  - change management.css
    - add ::selection
    - add Selected Option Styling
  - add passwordMatchCheck to management.js
  - update create.html

- update user
  - add makeLocalTime in management.js
  - update users.html
  - update Pagination
    - add size of items
    - rename size to show

- update goodbye.html

- update logout.html

- update login.html

- update welcome.html

- update index.html

- update layout
  - update management.css
  - update management.js
  - update layout.html

src/main/kotlin/ltd/hlaeja/util/Mapping.kt

@@ -10,15 +10,19 @@ fun SpringAuthentication.toAuthenticationRequest(): Authentication.Request = Aut
     credentials as String,
 )
 
-fun AccountForm.toAccountRequest(operation: (CharSequence?) -> CharSequence?): Account.Request = Account.Request(
+fun AccountForm.toAccountRequest(): Account.Request = Account.Request(
     username = username,
-    password = operation(password),
+    password = if (password.isNullOrEmpty()) null else password,
     enabled = enabled,
-    roles = listOf("ROLE_${role.uppercase()}"),
+    roles = roles.map { "ROLE_${it.uppercase()}" },
 )
 
 fun Account.Response.toAccountForm(): AccountForm = AccountForm(
     username = username,
     enabled = enabled,
-    role = roles.first().removePrefix("ROLE_").lowercase(),
+    roles = roles.map {
+        it.removePrefix("ROLE_")
+            .lowercase()
+            .replaceFirstChar { char -> char.uppercase() }
+    },
 )