New Morse TX app (#2948)

* morse tx
* global button repeat function improvement

firmware/application/ui/ui_receiver.cpp

@@ -26,6 +26,7 @@
 #include "string_format.hpp"
 #include "ui_receiver.hpp"
 #include "ui_freqman.hpp"
+#include "audio.hpp"
 
 using namespace portapack;
 
@@ -591,8 +592,13 @@ AudioVolumeField::AudioVolumeField(
           /* fill char */ ' '} {
     set_value(receiver_model.normalized_headphone_volume());
 
-    on_change = [](int32_t v) {
-        receiver_model.set_normalized_headphone_volume(v);
+    on_change = [](int32_t vol) {
+        // don't call receiver model, because this widget shuld be able to handle volume settinsg from any app, regardless of the receiver model's enables state. like the tx apps should be able to set volume too.
+        // this is identical to the receiver model's method
+        uint8_t v = clip<uint8_t>(vol, 0, 99);
+        auto new_volume = volume_t::decibel(v - 99) + audio::headphone::volume_range().max;
+        persistent_memory::set_headphone_volume(new_volume);
+        audio::headphone::set_volume(new_volume);
     };
 }