Breakpoint with stackframe should use debugStackframeDot (microsoft#211335)

Author: aeschli

src/vs/workbench/contrib/debug/browser/media/debug.contribution.css

@@ -36,8 +36,8 @@
 .codicon-debug-breakpoint-conditional.codicon-debug-stackframe::after,
 .codicon-debug-breakpoint.codicon-debug-stackframe-focused::after,
 .codicon-debug-breakpoint.codicon-debug-stackframe::after {
-	content: var(--vscode-icon-circle-small-filled-content);
-	font-family: var(--vscode-icon-circle-small-filled-font-family);
+	content: var(--vscode-icon-debug-stackframe-dot-content);
+	font-family: var(--vscode-icon-debug-stackframe-dot-font-family);
 	position: absolute;
 }