Major rewrite: less repetition (#101)

* first step of rewriting: at least it compiles™

* fix tabs/spaces

* fix dabort on load

* fix preview crash

* sorting isnt done outside of loading

* step one of making remake_file useless

* camera/qr code cleanup

* fix dabort when folder is empty, and bring back preview optimization

* fix button for switching modes and show mode when folder is empty

* fix scanning qrs

* no more splash discrimination

* add debug helpers

* fix theme installing
turns out that wasnt such a good idea

* fix battery icon

* mistake

* themeplaza compatibility

* make use of load_data

* don't drink and copy-paste, kids

* fix user-agent

* remove useless

* cleanup includes

* not even used

* add splash buttons

* upgrade buttons drawing

* fix controls while preview is up

* improve positions

include/camera.h

@@ -29,11 +29,10 @@
 
 #include "common.h"
 
-bool qr_mode;
-
 void init_qr(void);
 void exit_qr(void);
 void take_picture(void);
-Result http_get(char *url, char *path);
+bool scan_qr(EntryMode current_mode);
+Result http_get(char *url, const char *path);
 
 #endif