Digit Mode for frequency field (#1298)

* Remove 'auto' step mode

* Support per-digit edits on the freq field.

* Swizzle instead of raw accessor

* Fix debug ui after swizzle

firmware/common/ui.cpp

@@ -20,6 +20,7 @@
  */
 
 #include "ui.hpp"
+#include "irq_controls.hpp"
 #include "sine_table.hpp"
 #include "utility.hpp"
 
@@ -102,4 +103,14 @@ Point fast_polar_to_point(int32_t angle, uint32_t distance) {
                  (int16_sin_s4(((1 << 16) * (-angle - 90)) / 360) * distance) / (1 << 16));
 }
 
+bool key_is_long_pressed(KeyEvent key) {
+    if (key < KeyEvent::Back) {
+        // TODO: this would make more sense as a flag on KeyEvent
+        // passed up to the UI via event dispatch.
+        return switch_is_long_pressed(static_cast<Switch>(key));
+    }
+
+    return false;
+}
+
 } /* namespace ui */