ui: turn off spell-checking the pasted sequence in browsers that supp…

…ort it

Of course the pasted sequence is not a valid dictionary entry; underlining it
in red is not only pointless but also ugly.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>

views/search.erb

@@ -31,7 +31,7 @@
           <div class="span12">
             <div class="offset-left sequence">
               <div class="clearfix">
-                <textarea name="sequence" id="sequence" rows="11" placeholder="Paste your sequence(s) here..." ></textarea>
+                <textarea name="sequence" id="sequence" rows="11" spellcheck="false" placeholder="Paste your sequence(s) here..." ></textarea>
               </div>
             </div>
           </div>