Restore full screen redraw in scale/ref change (allow do it in pause and see result)

main.c

@@ -1703,7 +1703,7 @@ void set_trace_type(int t, int type)
   }
   if (force) {
     plot_into_index(measured);
-//    force_set_markmap();
+    force_set_markmap();
   }
 }
 
@@ -1711,7 +1711,7 @@ void set_trace_channel(int t, int channel)
 {
   if (trace[t].channel != channel) {
     trace[t].channel = channel;
-//    force_set_markmap();
+    force_set_markmap();
   }
 }
 
@@ -1719,7 +1719,7 @@ void set_trace_scale(int t, float scale)
 {
   if (trace[t].scale != scale) {
     trace[t].scale = scale;
-//    force_set_markmap();
+    force_set_markmap();
   }
 }
 

plot.c

@@ -1707,8 +1707,7 @@ static void draw_battery_status(void)
 void
 request_to_redraw_grid(void)
 {
-  force_set_markmap();
-  redraw_request |= REDRAW_CELLS;
+  redraw_request |= REDRAW_AREA;
 }
 
 void