add a "popup" menu variant (for the reflow profile editor)

main/graphics/drawing.c

@@ -89,7 +89,7 @@ void LCD_setRect(int x0, int y0, int x1, int y1, bool fill, enum Color bw)
         else
             xDiff = x1 - x0;
 
-        while (xDiff > 0) {
+        while (xDiff >= 0) {
             LCD_setLine(x0, y0, x0, y1, bw);
 
             if (x0 > x1)
@@ -361,3 +361,9 @@ void LCD_invertDisplayData()
         LCD_displayMap[i] ^= 0xFF;
     }
 }
+
+void LCD_setShadeOverlay() {
+    for (int i = 0; i < (LCD_WIDTH * LCD_HEIGHT / 8); i++) {
+        LCD_displayMap[i] |= i & 1 ? 0x88 : 0x22;
+    }
+}

main/graphics/drawing.h

@@ -87,4 +87,7 @@ void LCD_invertDisplayData();
 
 void LCD_setBitmap(const struct BitmapImage *image, int x, int y, bool bg, enum Color color);
 
+/** draw dotted shadow over current content */
+void LCD_setShadeOverlay();
+
 #endif //LCD_DRAWING_H