Redirecting deep links after login

app/templates/login.html

@@ -9,6 +9,7 @@
     {% if ldap_enabled %}
 
       <form method="post" action="/login/ldap">
+        <input type="hidden" name="next" value="{{ next_url or '' }}">
         {% if ldap_error %}<div class="alert">{{ ldap_error }}</div>{% endif %}
         <label>Username
           <input type="text" name="username" value="{{ username or '' }}" required autofocus>
@@ -22,6 +23,7 @@
       <details class="local-login-panel" {% if local_error %}open{% endif %}>
         <summary>Use a local account instead</summary>
         <form method="post" action="/login">
+          <input type="hidden" name="next" value="{{ next_url or '' }}">
           {% if local_error %}<div class="alert">{{ local_error }}</div>{% endif %}
           <label>Email
             <input type="email" name="email" value="{{ email or '' }}" required>
@@ -36,6 +38,7 @@
     {% else %}
 
       <form method="post" action="/login">
+        <input type="hidden" name="next" value="{{ next_url or '' }}">
         {% if local_error %}<div class="alert">{{ local_error }}</div>{% endif %}
         <label>Email
           <input type="email" name="email" value="{{ email or '' }}" required autofocus>