Freqman mem reduce (#1076)

-made frequency lists a widget to avoid a full frequency_list copy
-reduced FREQMAN_MAX_PER_FILE to a working limit

firmware/application/CMakeLists.txt

@@ -218,6 +218,7 @@ set(CPPSRC
 	ui/ui_btngrid.cpp
 	ui/ui_receiver.cpp
 	ui/ui_rssi.cpp
+	ui/ui_freqlist.cpp
 	ui/ui_tv.cpp
 	ui/ui_spectrum.cpp
 	ui/ui_tabview.cpp