fix(passwordfields): use PasswordEdit widget for all password fields

Fixes #3378.

src/loginscreen.ui

@@ -294,11 +294,7 @@
           </widget>
          </item>
          <item>
-          <widget class="QLineEdit" name="loginPassword">
-           <property name="echoMode">
-            <enum>QLineEdit::Password</enum>
-           </property>
-          </widget>
+          <widget class="PasswordEdit" name="loginPassword"/>
          </item>
          <item>
           <widget class="QCheckBox" name="autoLoginCB">

src/widget/form/setpassworddialog.ui

@@ -43,18 +43,10 @@
       </widget>
      </item>
      <item row="4" column="1">
-      <widget class="QLineEdit" name="repasswordlineEdit">
-       <property name="echoMode">
-        <enum>QLineEdit::Password</enum>
-       </property>
-      </widget>
+      <widget class="PasswordEdit" name="repasswordlineEdit"/>
      </item>
      <item row="2" column="1">
-      <widget class="QLineEdit" name="passwordlineEdit">
-       <property name="echoMode">
-        <enum>QLineEdit::Password</enum>
-       </property>
-      </widget>
+      <widget class="PasswordEdit" name="passwordlineEdit"/>
      </item>
      <item row="6" column="0" colspan="2">
       <widget class="QProgressBar" name="passStrengthMeter">
@@ -96,6 +88,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>PasswordEdit</class>
+   <extends>QLineEdit</extends>
+   <header>src/widget/passwordedit.h</header>
+  </customwidget>
+ </customwidgets>
  <tabstops>
   <tabstop>passwordlineEdit</tabstop>
   <tabstop>repasswordlineEdit</tabstop>