[CORE] Support for SetWindowTitle and InitWindow for web (#3222)

* Update raylib.h

Changed SetWindowTitle's description

* Update rcore.c

SetWindowTitle now works on web

* Update rcore.c

InitWindow title now works with web platform too.

src/raylib.h

@@ -954,7 +954,7 @@ RLAPI void MinimizeWindow(void);                                  // Set window
 RLAPI void RestoreWindow(void);                                   // Set window state: not minimized/maximized (only PLATFORM_DESKTOP)
 RLAPI void SetWindowIcon(Image image);                            // Set icon for window (single image, RGBA 32bit, only PLATFORM_DESKTOP)
 RLAPI void SetWindowIcons(Image *images, int count);              // Set icon for window (multiple images, RGBA 32bit, only PLATFORM_DESKTOP)
-RLAPI void SetWindowTitle(const char *title);                     // Set title for window (only PLATFORM_DESKTOP)
+RLAPI void SetWindowTitle(const char *title);                     // Set title for window (only PLATFORM_DESKTOP and PLATFORM_WEB)
 RLAPI void SetWindowPosition(int x, int y);                       // Set window position on screen (only PLATFORM_DESKTOP)
 RLAPI void SetWindowMonitor(int monitor);                         // Set monitor for the current window
 RLAPI void SetWindowMinSize(int width, int height);               // Set window minimum dimensions (for FLAG_WINDOW_RESIZABLE)

src/rcore.c

@@ -1736,13 +1736,16 @@ void SetWindowIcons(Image *images, int count)
 #endif
 }
 
-// Set title for window (only PLATFORM_DESKTOP)
+// Set title for window (only PLATFORM_DESKTOP and PLATFORM_WEB)
 void SetWindowTitle(const char *title)
 {
     CORE.Window.title = title;
 #if defined(PLATFORM_DESKTOP)
     glfwSetWindowTitle(CORE.Window.handle, title);
 #endif
+#if defined(PLATFORM_WEB)
+    emscripten_set_window_title(title);
+#endif
 }
 
 // Set window position on screen (windowed mode)
@@ -4433,6 +4436,11 @@ static bool InitGraphicsDevice(int width, int height)
         return false;
     }
 
+// glfwCreateWindow title doesn't work with emscripten.
+#if defined(PLATFORM_WEB)
+    emscripten_set_window_title((CORE.Window.title != 0)? CORE.Window.title : " ");
+#endif
+    
     // Set window callback events
     glfwSetWindowSizeCallback(CORE.Window.handle, WindowSizeCallback);      // NOTE: Resizing not allowed by default!
 #if !defined(PLATFORM_WEB)