chore(bw): simplify navigation code (#5269)

radio/src/keys.cpp

@@ -102,7 +102,7 @@ event_t Key::input(bool val)
       evt = (m_flags & KFLAG_LONG_PRESS) ? _MSK_KEY_LONG_BRK : _MSK_KEY_BREAK;
     }
 #else
-    if ((m_flags & (KFLAG_KILLED|KFLAG_LONG_PRESS)) == 0) {
+    if ((m_flags & (KFLAG_KILLED)) == 0) {
       evt = _MSK_KEY_BREAK;
     }
 #endif
@@ -443,6 +443,7 @@ bool keysPollingCycle()
       if (evt == EVT_KEY_LONG(KEY_PAGEDN)) {
         // Convert long press PAGEDN to short press PAGEUP
         evt = EVT_KEY_BREAK(KEY_PAGEUP);
+        killEvents(KEY_PAGEDN);
       }
 #endif
 #if defined(KEYS_GPIO_REG_SHIFT)