Fix touch screen handler

The touch screen handler was broken for the ESP8266 only. The library
uses SPI write only configuration for ESP8266 so the SPI buffer can be
recycled and it was left in write only mode. The library now switches
back to read & write mode at the end of a transaction.

examples/Test and diagnostics/Read_User_Setup/Read_User_Setup.ino

@@ -42,7 +42,7 @@ tft.getSetup(user); //
 
 Serial.printf("\n[code]\n");
 
-Serial.print ("TFT_eSPI ver = " + user.version +"\n");
+Serial.print ("TFT_eSPI ver = " + user.version + "\n");
 Serial.printf("Processor    = ESP%i\n", user.esp, HEX);
 Serial.printf("Frequency    = %i MHz\n", ESP.getCpuFreqMHz());
 #ifdef ESP8266