Changes to block until the LCD update has completed if the LCD_DISPLAY_NOW is set

This fixes issues during firmware update where the incomming data also blocks the CPU and the LCD was not being updated, especcially over Ethernet as the data is received much faster than WiFI

Author: jeremypoulter

src/lcd.cpp

@@ -77,7 +77,7 @@ void LcdTask::display(Message *msg, uint32_t flags)
   _tail = msg;
 
   if(flags & LCD_DISPLAY_NOW) {
-    MicroTask.wakeTask(this);
+    displayNextMessage();
   }
 }
 
@@ -704,7 +704,7 @@ void LcdTask::displayNameValue(int line, const char *name, const char *value)
 
 void LcdTask::showText(int x, int y, const char *msg, bool clear)
 {
-  DBUGF("LCD: %d %d %s", x, y, msg);
+  DBUGF("LCD: %d %d %s, clear=%s", x, y, msg, clear ? "true" : "false");
   _evse->getOpenEVSE().lcdDisplayText(x, y, msg, IGNORE);
   if(clear)
   {
@@ -715,6 +715,9 @@ void LcdTask::showText(int x, int y, const char *msg, bool clear)
       _evse->getOpenEVSE().lcdDisplayText(i, y, "      ", IGNORE);
     }
   }
+
+  // HACK: wait for the display to finish, fixes issues withupdating the display wile updating the firmware
+  _evse->getSender().flush();
 }
 
 void LcdTask::onButton(int long_press)