Refactor auth module.

- Switch from form to text field for passphrase input.
- Refactor error dialog format.
- Send dialog on incorrect parsing of private key.
- Refactor block sync service to take parameters.

src/app/auth/auth.component.html

@@ -17,8 +17,8 @@
 
             <mat-form-field appearance="outline" class="full-width">
               <mat-label>Private Key</mat-label>
-              <textarea matInput style="height: 30rem" name="privateKeyAsc" id="privateKeyAsc" formControlName="key"
-                        placeholder="Enter your private key..." [errorStateMatcher]="matcher"></textarea>
+              <textarea matInput style="height: 30rem" formControlName="key" placeholder="Enter your private key..."
+                        [errorStateMatcher]="matcher"></textarea>
               <div *ngIf="submitted && keyFormStub.key.errors" class="invalid-feedback">
                 <mat-error *ngIf="keyFormStub.key.errors.required">Private Key is required.</mat-error>
               </div>
@@ -34,23 +34,10 @@
         <div  id="two" style="display: none" class="card-body p-4 align-items-center">
 
           <div class="text-center w-75 m-auto">
-            <h4 class="text-dark-50 text-center font-weight-bold">Enter Passphrase</h4>
+            <h4 id="state" class="text-dark-50 text-center font-weight-bold"></h4>
+            <button mat-raised-button matRipple color="primary" type="submit" (click)="login()"> Login </button>
           </div>
 
-          <form [formGroup]="stateForm" (ngSubmit)="login()">
-
-            <mat-form-field appearance="outline" class="full-width">
-              <mat-label>Login State</mat-label>
-              <input matInput name="state" id="state" formControlName="state" readonly disabled>
-            </mat-form-field>
-
-            <div class="form-group mb-0 text-center">
-              <button mat-raised-button matRipple color="primary" type="submit">
-                Login
-              </button>
-            </div>
-          </form>
-
           <div class="row mt-3">
             <div class="col-12 text-center">
               <p class="text-muted">Change private key? <a (click)="switchWindows()" class="text-muted ml-1"><b>Enter private key</b></a></p>