gsdump: reset state when dump is invalid & ensure you can't run it if started

pcsx2/gui/Dialogs/GSDumpDialog.cpp

@@ -174,13 +174,8 @@ void Dialogs::GSDumpDialog::SelectedDump(wxListEvent& evt)
 
 void Dialogs::GSDumpDialog::RunDump(wxCommandEvent& event)
 {
-	m_debug_mode->Enable();
-	m_start->Enable();
-	m_step->Enable();
-	m_selection->Enable();
-	m_vsync->Enable();
-	m_run->Disable();
-
+	if (!m_run->IsEnabled())
+		return;
 	m_thread->m_dump_file = std::make_unique<pxInputStream>(m_selected_dump, new wxFFileInputStream(m_selected_dump));
 
 	if (!(m_thread->m_dump_file)->IsOk())
@@ -190,6 +185,12 @@ void Dialogs::GSDumpDialog::RunDump(wxCommandEvent& event)
 		wxMessageBox(s, _("GSDumpGov"), wxICON_ERROR);
 		return;
 	}
+	m_run->Disable();
+	m_debug_mode->Enable();
+	m_start->Enable();
+	m_step->Enable();
+	m_selection->Enable();
+	m_vsync->Enable();
 	m_thread->Start();
 	return;
 }

pcsx2/gui/Dialogs/ModalPopups.h

@@ -162,6 +162,7 @@ namespace Dialogs
 		wxButton* m_selection;
 		wxButton* m_vsync;
 		wxButton* m_run;
+		long m_focused_dump;
 		wxFileSystemWatcher m_fs_watcher;
 
 		void GetDumpsList();