Add Notepad app (#1010)

* easier 'now', start adding text editor

* Adding scrolling to notepad

* Better scrolling

* Better scrolling, off-by-1 bugs

* MVP fit and finish

* Add tiny font and use in Notepad

* Font tweaking, tiny font cursor

* Fix warning

* Format changed files

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Co-authored-by: kallanreed <kallanreed@outlook.com>

firmware/application/CMakeLists.txt

@@ -210,6 +210,7 @@ set(CPPSRC
 	ui/ui_alphanum.cpp
 	ui/ui_audio.cpp
 	ui/ui_channel.cpp
+	ui/ui_font_fixed_5x8.cpp
 	ui/ui_font_fixed_8x16.cpp
 	ui/ui_geomap.cpp
 	ui/ui_qrcode.cpp
@@ -259,6 +260,7 @@ set(CPPSRC
 	apps/ui_sonde.cpp
 	apps/ui_sstvtx.cpp
 	# apps/ui_test.cpp
+	apps/ui_text_editor.cpp
 	apps/ui_tone_search.cpp
 	apps/ui_touch_calibration.cpp
 	apps/ui_touchtunes.cpp