clue can be html

templates/adminCiphers.html

@@ -39,7 +39,7 @@
         <label for="solution">Řešení:</label>
         <input type="text" id="solution" name="solution" required>
         <label for="clue">Nápověda:</label>
-        <input type="text" id="clue" name="clue" required>
+        <textarea id="clue" name="clue" cols="40" rows="5" required></textarea>
         <input type="submit" value="Přidat šifru">
     </form>
     <hr>