don't set statusbar background color

people with dark system theme otherwise have white text on light-grey bg

uibase.cpp

@@ -61,7 +61,6 @@ CMainFrameBase::CMainFrameBase( wxWindow* parent, wxWindowID id, const wxString&
 	m_toolBar->Realize();
 	
 	m_statusBar = this->CreateStatusBar( 1, wxST_SIZEGRIP, wxID_ANY );
-	m_statusBar->SetBackgroundColour( wxColour( 240, 240, 240 ) );
 	
 	wxBoxSizer* bSizer2;
 	bSizer2 = new wxBoxSizer( wxVERTICAL );

uiproject.fbp

@@ -282,7 +282,7 @@
                 </object>
             </object>
             <object class="wxStatusBar" expanded="1">
-                <property name="bg">240,240,240</property>
+                <property name="bg"></property>
                 <property name="context_help"></property>
                 <property name="enabled">1</property>
                 <property name="fg"></property>