ui improvements

- update dot style
- hide dot and tooltip for quote item
- hide scrollbar on firefox
- add hover effect for control btns
- fix url regex

src/index.css

@@ -7,9 +7,12 @@ body {
     background-color: #124;
 }
 
-body::-webkit-scrollbar {
+html::-webkit-scrollbar {
     display: none;
 }
+html {
+    scrollbar-width: none;
+}
 
 body, textarea, pre {
     font-family: 'Segoe UI', '微软雅黑', 'Microsoft YaHei', sans-serif;