Raise version add comments for button update

Extensions/Button.h

@@ -2,7 +2,8 @@
 // The following button class has been ported over from the Adafruit_GFX library so
 // should be compatible.
 // A slightly different implementation in this TFT_eSPI library allows the button
-// legends to be in any font
+// legends to be in any font, allow longer labels and to adjust text positioning
+// within button
 ***************************************************************************************/
 
 class TFT_eSPI_Button {
@@ -20,23 +21,24 @@ class TFT_eSPI_Button {
   uint16_t textcolor, char *label, uint8_t textsize);
   
   // Adjust text datum and x, y deltas
-  void setLabelDatum(int16_t x_delta, int16_t y_delta, uint8_t datum = MC_DATUM);
+  void     setLabelDatum(int16_t x_delta, int16_t y_delta, uint8_t datum = MC_DATUM);
   
   void     drawButton(bool inverted = false, String long_name = "");
-  bool  contains(int16_t x, int16_t y);
+  bool     contains(int16_t x, int16_t y);
 
   void     press(bool p);
-  bool  isPressed();
-  bool  justPressed();
-  bool  justReleased();
+  bool     isPressed();
+  bool     justPressed();
+  bool     justReleased();
 
  private:
   TFT_eSPI *_gfx;
-  int16_t  _x1, _y1, _xd, _yd; // Coordinates of top-left corner
-  uint16_t _w, _h;
-  uint8_t  _textsize, _textdatum;
+  int16_t  _x1, _y1; // Coordinates of top-left corner of button
+  int16_t  _xd, _yd; // Button text datum offsets (wrt center of button)
+  uint16_t _w, _h;   // Width and height of button
+  uint8_t  _textsize, _textdatum; // Text size multiplier and text datum for button
   uint16_t _outlinecolor, _fillcolor, _textcolor;
-  char     _label[10];
+  char     _label[10]; // Button text is 9 chars maximum unless long_name used
 
-  bool  currstate, laststate;
+  bool  currstate, laststate; // Button states
 };