gui: rename Master to Module in the hierarchy browser column headings

Fixes #8042

Signed-off-by: Matt Liberty <[email protected]>

Author: maliberty

src/gui/src/browserWidget.cpp

@@ -115,7 +115,7 @@ BrowserWidget::BrowserWidget(
   display_controls_warning_->setStyleSheet("color: red;");
 
   model_->setHorizontalHeaderLabels({"Instance",
-                                     "Master",
+                                     "Module",
                                      "Instances",
                                      "Macros",
                                      "Modules",