Format header files

In my PR updating clang-format, I forgot to also format the headers.

src/displayapp/screens/Screen.h

@@ -7,13 +7,16 @@
 namespace Pinetime {
   namespace Applications {
     class DisplayApp;
+
     namespace Screens {
 
       template <class T> class DirtyValue {
       public:
         DirtyValue() = default; // Use NSDMI
+
         explicit DirtyValue(T const& v) : value {v} {
         } // Use MIL and const-lvalue-ref
+
         bool IsUpdated() {
           if (this->isUpdated) {
             this->isUpdated = false;
@@ -21,10 +24,12 @@ namespace Pinetime {
           }
           return false;
         }
+
         T const& Get() {
           this->isUpdated = false;
           return value;
         } // never expose a non-const lvalue-ref
+
         DirtyValue& operator=(const T& other) {
           if (this->value != other) {
             this->value = other;
@@ -46,6 +51,7 @@ namespace Pinetime {
       public:
         explicit Screen(DisplayApp* app) : app {app} {
         }
+
         virtual ~Screen() = default;
 
         static void RefreshTaskCallback(lv_task_t* task);
@@ -64,6 +70,7 @@ namespace Pinetime {
         virtual bool OnTouchEvent(TouchEvents event) {
           return false;
         }
+
         virtual bool OnTouchEvent(uint16_t x, uint16_t y) {
           return false;
         }