Fix button placement in minimized in-game windows

Some windows position their buttons based on GetSize().y, which results
in incorrect placement if the window is persisted and minimized.
Replace uses of GetSize() with GetFullSize().

Affected windows:
* iwBuildings
* iwDistribution
* iwWares

Author: falbrechtskirchinger

libs/s25main/ingameWindows/iwBuildings.cpp

@@ -67,10 +67,10 @@ iwBuildings::iwBuildings(GameWorldView& gwv, GameCommandFactory& gcFactory)
         }
     }
 
-    // Hilfe-Button
+    // "Help" button
     Extent btSize = Extent(30, 32);
-    AddImageButton(32, GetSize() - DrawPoint(14, 20) - btSize, btSize, TextureColor::Grey, LOADER.GetImageN("io", 225),
-                   _("Help"));
+    AddImageButton(32, GetFullSize() - DrawPoint(14, 20) - btSize, btSize, TextureColor::Grey,
+                   LOADER.GetImageN("io", 225), _("Help"));
 }
 
 /// Anzahlen der Gebäude zeichnen

libs/s25main/ingameWindows/iwDistribution.cpp

@@ -62,12 +62,12 @@ iwDistribution::iwDistribution(const GameWorldViewer& gwv, GameCommandFactory& g
     tab->SetSelection(0);
 
     const Extent btSize(32, 32);
-    // Hilfe
-    AddImageButton(2, DrawPoint(15, GetSize().y - 15 - btSize.y), btSize, TextureColor::Grey,
+    // "Help" button
+    AddImageButton(2, DrawPoint(15, GetFullSize().y - 15 - btSize.y), btSize, TextureColor::Grey,
                    LOADER.GetImageN("io", 225), _("Help"));
-    // Standardbelegung
-    AddImageButton(10, GetSize() - DrawPoint::all(15) - btSize, btSize, TextureColor::Grey, LOADER.GetImageN("io", 191),
-                   _("Default"));
+    // "Default" button
+    AddImageButton(10, GetFullSize() - DrawPoint::all(15) - btSize, btSize, TextureColor::Grey,
+                   LOADER.GetImageN("io", 191), _("Default"));
 
     iwDistribution::UpdateSettings();
 }

libs/s25main/ingameWindows/iwWares.cpp

@@ -130,12 +130,12 @@ iwWares::iwWares(unsigned id, const DrawPoint& pos, const Extent& size, const st
         }
     }
 
-    // "Blättern"
-    AddImageButton(0, DrawPoint(52, GetSize().y - 47), Extent(66, 32), TextureColor::Grey, LOADER.GetImageN("io", 84),
-                   _("Next page"));
-    // Hilfe
-    AddImageButton(12, DrawPoint(16, GetSize().y - 47), Extent(32, 32), TextureColor::Grey, LOADER.GetImageN("io", 225),
-                   _("Help"));
+    // "Next page" button
+    AddImageButton(0, DrawPoint(52, GetFullSize().y - 47), Extent(66, 32), TextureColor::Grey,
+                   LOADER.GetImageN("io", 84), _("Next page"));
+    // "Help" button
+    AddImageButton(12, DrawPoint(16, GetFullSize().y - 47), Extent(32, 32), TextureColor::Grey,
+                   LOADER.GetImageN("io", 225), _("Help"));
 
     waresPage.SetVisible(true);
     curPage_ = warePageID;