Do not redraw screen on cursor move if the cursor didn't actually move

src/gui/Window.cc

@@ -250,26 +250,26 @@ void Window::handle_key(uint32_t scancode, uint32_t mod)
 
 void Window::cursor_left()
 {
-    m_cursor->go_left(1);
-    redraw();
+    if (m_cursor->go_left(1))
+        redraw();
 }
 
 void Window::cursor_right()
 {
-    m_cursor->go_right(1);
-    redraw();
+    if (m_cursor->go_right(1))
+        redraw();
 }
 
 void Window::cursor_up()
 {
-    m_cursor->go_up(1, m_cursor->column);
-    redraw();
+    if (m_cursor->go_up(1, m_cursor->column))
+        redraw();
 }
 
 void Window::cursor_down()
 {
-    m_cursor->go_down(1, m_cursor->column);
-    redraw();
+    if (m_cursor->go_down(1, m_cursor->column))
+        redraw();
 }
 
 void Window::scroll_down()