fix: make tooltip text no-selecting (#567)

* no selecting tooltip text

With a double click on button, you can get selection on tooltip text. That may be distracting a little bit.

* Update web/src/less/memo.less

Co-authored-by: Stephen Zhou <hi@hyoban.cc>

Co-authored-by: Stephen Zhou <hi@hyoban.cc>
Co-authored-by: boojack <stevenlgtm@gmail.com>

web/src/less/memo.less

@@ -61,7 +61,7 @@
             @apply w-full flex flex-row justify-around items-center border-b border-gray-100 p-1 mb-1;
 
             > .btn {
-              @apply relative w-6 h-6 p-1 text-gray-600 cursor-pointer;
+              @apply relative w-6 h-6 p-1 text-gray-600 cursor-pointer select-none;
 
               &:hover > .tip-text {
                 @apply block;