SymField rewrite (#1444)

* First WIP symfield

* Cleanup widget code

* Rebase and format

* Fix 'to_integer' bug, fix siggen UI.

* to_string_hex fix, unit tests for string code

* Pass instance in callback

* Fix on_change callbacks

* Fix keyfob (not active)

* to_byte_array, coaster tx cleanup

* Add to_byte_array tests

* Changes in ui_numbers

* Fix ui_encoders

* Format

* Fix modemsetup view's symfields

* Remove header

* Format

firmware/application/apps/ui_aprs_tx.hpp

@@ -68,7 +68,8 @@ class APRSTXView : public View {
     SymField sym_source{
         {7 * 8, 1 * 16},
         6,
-        SymField::SYMFIELD_ALPHANUM};
+        SymField::Type::Alpha};
+
     NumberField num_ssid_source{
         {19 * 8, 1 * 16},
         2,
@@ -79,7 +80,7 @@ class APRSTXView : public View {
     SymField sym_dest{
         {7 * 8, 2 * 16},
         6,
-        SymField::SYMFIELD_ALPHANUM};
+        SymField::Type::Alpha};
 
     NumberField num_ssid_dest{
         {19 * 8, 2 * 16},