fix redundant reflow on application start, might break on some x implementations

src/Window.cpp

@@ -142,11 +142,17 @@ void Window::end_batch() {
     m_invalidated_area = {0, 0, 0, 0};
 }
 
+void Window::swallow_batches() {
+    m_batches = 0;
+    m_did_relayout_during_batch = false;
+    m_invalidated_area = {0, 0, 0, 0};
+}
+
 void Window::run(bool block) {
     XEvent e;
     bool is_loop_batch_started = false;
 
-    end_batch();
+    swallow_batches();
 
     for (;;) {
         if (block || XPending(m_x_display))

src/Window.hpp

@@ -22,6 +22,7 @@ public:
 
     void start_batch();
     void end_batch();
+    void swallow_batches();
 
 
     Painter &painter() { return m_painter; }