Added bandwidth selector

src/gui.h

@@ -35,6 +35,7 @@ extern bool afscreen;
 extern bool artheadold;
 extern bool autosquelch;
 extern bool BWreset;
+extern bool BWtune;
 extern bool change;
 extern bool compressedold;
 extern bool dropout;
@@ -84,6 +85,7 @@ extern byte bandFM;
 extern byte bandforbidden;
 extern byte batteryold;
 extern byte batteryoptions;
+extern byte BWset;
 extern byte ContrastSet;
 extern byte CurrentSkin;
 extern byte CurrentTheme;
@@ -220,11 +222,13 @@ void BuildAFScreen();
 void BuildMenu();
 void BuildAdvancedRDS();
 void BuildDisplay();
+void BuildBWSelector();
 void MenuUp();
 void MenuDown();
 void DoMenu();
 void doTheme();
 void Infoboxprint(const char* input);
+void drawButton(const char* text, byte button_number, bool active);
 String removeNewline(String inputString);
 
 extern void ShowFreq(int mode);