Add flags to hide UIs in util_powershell_handler.py

Author: eliasamurphy

utilities/util_powershell_handler.py

@@ -130,6 +130,8 @@ def run_powershell_command(
         "-NoProfile",
         "-ExecutionPolicy",
         "Bypass",
+        "-WindowStyle",
+        "Hidden",
         "-Command",
         command,
     ]
@@ -211,4 +213,4 @@ def _stream(pipe, log_fn, label):
         raise RuntimeError(f"PowerShell command failed (code {rc})")
     else:
         logger.debug(f"PowerShell completed successfully (code {rc})")
-    return rc
+    return rc