ui: remove mechanisms for mandatory password

The password is no longer mandatory when creating an account. It also
means it is not necessary to export or link to one. Password
verification is then removed so choosing one is recommended but not
enforced.

Change-Id: I2b8735fcb3c8d98ed6f85dac70c1eb852d4dae5f
Reviewed-by: Kateryna Kostiuk <kateryna.kostiuk@savoirfairelinux.com>
diff --git a/src/RingWizardNewAccountVC.mm b/src/RingWizardNewAccountVC.mm
index 4f5d578..9338f18 100644
--- a/src/RingWizardNewAccountVC.mm
+++ b/src/RingWizardNewAccountVC.mm
@@ -171,7 +171,7 @@
 
 - (BOOL)isRepeatPasswordValid
 {
-    return [self.password isEqualToString:self.repeatPassword];
+    return [self.password isEqualToString:self.repeatPassword] || ([self.password length] == 0 && [self.repeatPassword length] == 0);
 }
 
 - (BOOL)validateRepeatPassword:(NSError **)error