Add a location picker for selecting a location in a town or outdoor sector.

It's currently used in special node editing and in advanced town details.

proj/vs2017/Scenario Editor/Scenario Editor.vcxproj

@@ -161,6 +161,7 @@
     <ClCompile Include="..\..\..\src\scenedit\scen.fileio.cpp" />
     <ClCompile Include="..\..\..\src\scenedit\scen.graphics.cpp" />
     <ClCompile Include="..\..\..\src\scenedit\scen.keydlgs.cpp" />
+    <ClCompile Include="..\..\..\src\scenedit\scen.locpicker.cpp" />
     <ClCompile Include="..\..\..\src\scenedit\scen.main.cpp" />
     <ClCompile Include="..\..\..\src\scenedit\scen.menus.win.cpp" />
     <ClCompile Include="..\..\..\src\scenedit\scen.townout.cpp" />
@@ -177,6 +178,7 @@
     <ClInclude Include="..\..\..\src\scenedit\scen.global.hpp" />
     <ClInclude Include="..\..\..\src\scenedit\scen.graphics.hpp" />
     <ClInclude Include="..\..\..\src\scenedit\scen.keydlgs.hpp" />
+    <ClInclude Include="..\..\..\src\scenedit\scen.locpicker.hpp" />
     <ClInclude Include="..\..\..\src\scenedit\scen.menus.hpp" />
     <ClInclude Include="..\..\..\src\scenedit\scen.townout.hpp" />
   </ItemGroup>

proj/vs2017/Scenario Editor/Scenario Editor.vcxproj.filters

@@ -33,6 +33,9 @@
     <ClCompile Include="..\..\..\src\scenedit\scen.keydlgs.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\src\scenedit\scen.locpicker.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\src\scenedit\scen.main.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
@@ -74,6 +77,9 @@
     <ClInclude Include="..\..\..\src\scenedit\scen.keydlgs.hpp">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\src\scenedit\scen.locpicker.hpp">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\src\scenedit\scen.menus.hpp">
       <Filter>Header Files</Filter>
     </ClInclude>