test: run test_help for browser and dashboard

artiq/test/test_frontends.py

@@ -7,7 +7,6 @@ import unittest
 class TestFrontends(unittest.TestCase):
     def test_help(self):
         """Test --help as a simple smoke test against catastrophic breakage."""
-        # Skip tests for GUI programs on headless CI environments.
         commands = {
             "aqctl": [
                 "corelog"
@@ -15,7 +14,7 @@ class TestFrontends(unittest.TestCase):
             "artiq": [
                 "client", "compile", "coreanalyzer", "coremgmt",
                 "netboot", "flash", "master", "mkfs", "route",
-                "rtiomon", "run", "session"
+                "rtiomon", "run", "session", "browser", "dashboard"
             ]
         }