Some (unsuccessfull) encoder tests

Extra/EncoderPollingTest/UI.ino

@@ -0,0 +1,13 @@
+void updateScreen() {
+  
+  u8g2.firstPage();
+  do {
+    String valueStr;
+    u8g2.setDrawColor(1);
+
+    valueStr = String(counter);
+    u8g2.setFont(u8g2_font_ncenB14_tr);
+    u8g2.drawStr(0,15,valueStr.c_str());
+
+  } while ( u8g2.nextPage() );
+}