link visibility of passphrase inputs on EnterPassphrase page

src/views/passphrase/EnterPassphrase.svelte

@@ -14,6 +14,7 @@
 
     const dispatch = createEventDispatcher();
 
+    let showPassphrase = false;
     let alert;
     let saving = false;
     let passphrase = '';
@@ -52,7 +53,6 @@
         try {
             await alert.run(async () => {
                 await invoke('set_passphrase', {passphrase})
-                throw('something bad happened');
                 $appState.sessionStatus = 'unlocked';
                 dispatch('save');
             });
@@ -73,6 +73,7 @@
         </div>
         <PassphraseInput
             bind:value={passphrase}
+            bind:show={showPassphrase}
             on:input={onInput}
             placeholder="correct horse battery staple"
         />
@@ -84,6 +85,7 @@
         </div>
         <PassphraseInput
             bind:value={confirmPassphrase}
+            bind:show={showPassphrase}
             on:input={onInput} on:change={onChange}
             placeholder="correct horse battery staple"
         />