Fix: Some NWidget lists were not properly closed. (#11425)

(cherry picked from commit d4a77411a5)

src/bootstrap_gui.cpp

@@ -33,6 +33,7 @@
 /** Widgets for the background window to prevent smearing. */
 static const struct NWidgetPart _background_widgets[] = {
 	NWidget(WWT_PANEL, COLOUR_DARK_BLUE, WID_BB_BACKGROUND), SetResize(1, 1),
+	EndContainer(),
 };
 
 /**

src/league_gui.cpp

@@ -194,6 +194,7 @@ static const NWidgetPart _nested_performance_league_widgets[] = {
 		NWidget(WWT_STICKYBOX, COLOUR_BROWN),
 	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_BROWN, WID_PLT_BACKGROUND), SetMinimalSize(400, 0), SetMinimalTextLines(15, WidgetDimensions::unscaled.framerect.Vertical()),
+	EndContainer(),
 };
 
 static WindowDesc _performance_league_desc(
@@ -426,6 +427,7 @@ static const NWidgetPart _nested_script_league_widgets[] = {
 		NWidget(WWT_STICKYBOX, COLOUR_BROWN),
 	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_BROWN, WID_SLT_BACKGROUND), SetMinimalSize(400, 0), SetMinimalTextLines(15, WidgetDimensions::scaled.framerect.Vertical()),
+	EndContainer(),
 };
 
 static WindowDesc _script_league_desc(

src/misc_gui.cpp

@@ -693,7 +693,7 @@ void HideFillingPercent(TextEffectID *te_id)
 }
 
 static const NWidgetPart _nested_tooltips_widgets[] = {
-	NWidget(WWT_EMPTY, INVALID_COLOUR, WID_TT_BACKGROUND), EndContainer(),
+	NWidget(WWT_EMPTY, INVALID_COLOUR, WID_TT_BACKGROUND),
 };
 
 static WindowDesc _tool_tips_desc(