update message displayed before retyping a xpub

static/admin/dmt/xpubs-tools/xpubs-tools.html

@@ -23,7 +23,13 @@
           <span>This XPUB isn't tracked by your Dojo. Do you want to import it and track its activity?</span>
         </div>
         <div id="import-deriv-reimport-msg">
-          <span>This XPUB is already tracked by your Dojo. Do you want to reimport it with a new derivation type?</span>
+          <span>Do you want to reimport this XPUB with a new derivation type?</span>
+          <br/><br/>
+          <span>WARNING: Are you sure you need to retype this XPUB? Generally, the 'auto' derivation will type your XPUB correctly.</span>
+          <br/>
+          <span>Retyping your XPUB is reserved for very specific circumstances, and should not be taken lightly.</span>
+          <br/>
+          <span>If in doubt, contact <a href="mailto:support@samouraiwallet.com">support@samouraiwallet.com</a></span>
         </div>
         <div class="spacer20"></div>
         <div>