Added difficulty param to alloc and reset function

This way the main allocation function for the app and any scenes that need to (like the settings confirmation scene) can reset
the game with the appropraite board dimensions and difficulty

views/minesweeper_game_screen.h

@@ -13,11 +13,10 @@
 
 // These defines represent how many tiles
 // can be visually representen on the screen 
+// due to icon sizes
 #define MINESWEEPER_SCREEN_TILE_HEIGHT 7
 #define MINESWEEPER_SCREEN_TILE_WIDTH 16
 
-#define MINESWEEPER_STARTING_MINES (44)
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -36,7 +35,7 @@ typedef bool (*GameScreenInputCallback)(InputEvent* event, void* context);
  *
  * @return      MineSweeperGameScreen view instance 
  */
-MineSweeperGameScreen* mine_sweeper_game_screen_alloc(uint8_t width, uint8_t height);
+MineSweeperGameScreen* mine_sweeper_game_screen_alloc(uint8_t width, uint8_t height, uint8_t difficulty);
 
 /** Deinitialize and free Start Screen view
  *
@@ -48,7 +47,7 @@ void mine_sweeper_game_screen_free(MineSweeperGameScreen* instance);
  *
  * @param       instance MineSweeperGameScreen instance
  */
-void mine_sweeper_game_screen_reset(MineSweeperGameScreen* instance, uint8_t width, uint8_t height);
+void mine_sweeper_game_screen_reset(MineSweeperGameScreen* instance, uint8_t width, uint8_t height, uint8_t difficulty);
 
 /** Get MineSweeperGameScreen view
  *