Misc. comments

Marlin/src/gcode/bedlevel/G26.cpp

             SERIAL_EOL();
           }
           idle();
-          MYSERIAL0.flush(); // G26 takes a long time to complete.   PronterFace can
-                             // over run the serial character buffer with M105's without
-                             // this fix
+          MYSERIAL0.flush(); // G26 takes a long time to complete. PronterFace may
+                             // overwhelm the serial buffer with M105's without this fix.
         }
     #if ENABLED(ULTRA_LCD)
       }
 
       wait_for_release();
 
-      strcpy_P(lcd_status_message, PSTR("Done Priming")); // We can't do lcd_setstatusPGM() without having it continue;
-                                                          // So... We cheat to get a message up.
+      strcpy_P(lcd_status_message, PSTR("Done Priming")); // Hack to get the message up. May be obsolete.
+
       lcd_setstatusPGM(PSTR("Done Priming"), 99);
       lcd_quick_feedback(true);
       lcd_external_control = false;

Marlin/src/lcd/ultralcd.cpp

       }
       #if ENABLED(AUTO_BED_LEVELING_UBL)
         if (lcd_external_control) {
-          ubl.encoder_diff = encoderDiff;   // Make the encoder's rotation available to G29's Mesh Editor
-          encoderDiff = 0;                  // We are going to lie to the LCD Panel and claim the encoder
-                                            // knob has not turned.
+          ubl.encoder_diff = encoderDiff;   // Make encoder rotation available to UBL G29 mesh editing.
+          encoderDiff = 0;                  // Hide the encoder event from the current screen handler.
         }
       #endif
       lastEncoderBits = enc;