Client builds & runs, can't test the gameplay without the server

SDL_ttf is now being initialized, and all usages of fonts are now checked for nullptr.
A bug where the renderer's logical size was not properly set has been fixed.
The FPS counter is disabled for now.

client/gameplay_scenes/world_map.cpp

@@ -103,7 +103,7 @@ void World::UpdateMap() {
 			}
 			else if (regionChecksum(region) == 0) {
 				//checksum failed
-				//NOTE: this patches bug #45, but does not resolve it
+				//BUG: #45 Regions occasionally lose their tile data; this patches the issue, but does not resolve it
 				regionPager.UnloadIf([region](Region const& ref) -> bool {
 					//remove the erroneous region
 					return region == &ref;