Use chevrons for Live Watch tree toggles (match VS Code watch view)

Author: Avlaak

resources/live-watch.html

@@ -59,15 +59,21 @@
         }
         .tree-toggle.collapsed::before {
             content: '';
-            border: 4px solid transparent;
-            border-left: 6px solid var(--vscode-foreground);
-            margin-left: 2px;
+            width: 6px;
+            height: 6px;
+            border: 1px solid var(--vscode-foreground);
+            border-width: 1px 1px 0 0;
+            transform: rotate(45deg);
+            margin-left: -2px;
         }
         .tree-toggle.expanded::before {
             content: '';
-            border: 4px solid transparent;
-            border-top: 6px solid var(--vscode-foreground);
-            margin-top: 2px;
+            width: 6px;
+            height: 6px;
+            border: 1px solid var(--vscode-foreground);
+            border-width: 1px 1px 0 0;
+            transform: rotate(135deg);
+            margin-top: -2px;
         }
         .tree-toggle.no-children {
             visibility: hidden;