Added groups - missing user management. Fixed several issues.

src/app/groups/group-item-edit/group-item-edit.component.html

@@ -0,0 +1,50 @@
+<mat-card>
+  <mat-card-header>
+    <mat-card-title-group>
+      <mat-card-title>Edit Group</mat-card-title>
+    </mat-card-title-group>
+  </mat-card-header>
+  <mat-card-content>
+    <mat-form-field>
+      <mat-label>Group Name</mat-label>
+      <input matInput type="text" [formControl]="nameForm" [disabled]="isSpecial" />
+      @if (nameForm.invalid && (nameForm.dirty || nameForm.touched)) {
+      @if (nameForm.hasError('required')) {
+      <small class="error">This field is required.</small>
+      }
+      }
+    </mat-form-field>
+    <mat-form-field>
+      <mat-label>TTS Priority</mat-label>
+      <input matInput type="number" [formControl]="priorityForm" />
+      @if (priorityForm.invalid && (priorityForm.dirty || priorityForm.touched)) {
+      @if (priorityForm.hasError('required')) {
+      <small class="error">This field is required.</small>
+      }
+      @if (priorityForm.hasError('min')) {
+      <small class="error">This field must be greater than -2147483649.</small>
+      }
+      @if (priorityForm.hasError('max')) {
+      <small class="error">This field must be smaller than 2147483648.</small>
+      }
+      @if (priorityForm.hasError('integer') && !priorityForm.hasError('min') && !priorityForm.hasError('max')) {
+      <small class="error">This field must be an integer.</small>
+      }
+      }
+    </mat-form-field>
+  </mat-card-content>
+  <mat-card-actions>
+    <button
+      mat-button
+      [disabled]="waitForResponse || formGroup.invalid"
+      (click)="add()">
+      <mat-icon>add</mat-icon>Add
+    </button>
+    <button
+      mat-button
+      [disabled]="waitForResponse"
+      (click)="cancel()">
+      <mat-icon>cancel</mat-icon>Cancel
+    </button>
+  </mat-card-actions>
+</mat-card>