one-time hints; builder touchups

src/components/chart/LimitBuilder.vue

@@ -33,10 +33,11 @@
                         style="flex: 6em"
           />
         </td>
-        <td class="weight">{{ weights.length ? allocationTexts[lowerIndex] : '' }}</td>
+        <td class="weight">{{ weights.length > 1 ? allocationTexts[lowerIndex] : '' }}</td>
       </tr>
       </tbody>
     </table>
+    <one-time-hint name="click-chart" activator="#tv-widget" location="center" :when="priceA===null" text="Click the chart!"/>
   </rung-builder>
 </template>
 
@@ -48,6 +49,7 @@ import {MAX_FRACTION, newTranche} from "@/blockchain/orderlib.js";
 import RungBuilder from "@/components/chart/RungBuilder.vue";
 import {computed, ref} from "vue";
 import {allocationText, HLine} from "@/charts/shape.js";
+import OneTimeHint from "@/components/OneTimeHint.vue";
 
 const s = useStore()
 const os = useOrderStore()