Feature: make the town directory horizontally resizable

(cherry picked from commit 0345f99180)

src/town_gui.cpp

@@ -664,12 +664,12 @@ static const NWidgetPart _nested_town_directory_widgets[] = {
 			NWidget(NWID_HORIZONTAL),
 				NWidget(WWT_TEXTBTN, COLOUR_BROWN, WID_TD_SORT_ORDER), SetDataTip(STR_BUTTON_SORT_BY, STR_TOOLTIP_SORT_ORDER),
 				NWidget(WWT_DROPDOWN, COLOUR_BROWN, WID_TD_SORT_CRITERIA), SetDataTip(STR_JUST_STRING, STR_TOOLTIP_SORT_CRITERIA),
-				NWidget(WWT_EDITBOX, COLOUR_BROWN, WID_TD_FILTER), SetFill(1, 0), SetDataTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP),
+				NWidget(WWT_EDITBOX, COLOUR_BROWN, WID_TD_FILTER), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_LIST_FILTER_OSKTITLE, STR_LIST_FILTER_TOOLTIP),
 			EndContainer(),
-			NWidget(WWT_PANEL, COLOUR_BROWN, WID_TD_LIST), SetMinimalSize(196, 0), SetDataTip(0x0, STR_TOWN_DIRECTORY_LIST_TOOLTIP),
-							SetFill(1, 0), SetResize(0, 1), SetScrollbar(WID_TD_SCROLLBAR), EndContainer(),
+			NWidget(WWT_PANEL, COLOUR_BROWN, WID_TD_LIST), SetDataTip(0x0, STR_TOWN_DIRECTORY_LIST_TOOLTIP),
+							SetFill(1, 0), SetResize(1, 1), SetScrollbar(WID_TD_SCROLLBAR), EndContainer(),
 			NWidget(WWT_PANEL, COLOUR_BROWN),
-				NWidget(WWT_TEXT, COLOUR_BROWN, WID_TD_WORLD_POPULATION), SetPadding(2, 0, 2, 2), SetMinimalSize(196, 0), SetMinimalTextLines(1, 0), SetFill(1, 0), SetDataTip(STR_TOWN_POPULATION, STR_NULL),
+				NWidget(WWT_TEXT, COLOUR_BROWN, WID_TD_WORLD_POPULATION), SetPadding(2, 0, 2, 2), SetMinimalTextLines(1, 0), SetFill(1, 0), SetResize(1, 0), SetDataTip(STR_TOWN_POPULATION, STR_NULL),
 			EndContainer(),
 		EndContainer(),
 		NWidget(NWID_VERTICAL),