Undo some TODO (#3024)

* TODO FL-3497: impossible to fix with current memory allocator

* TODO FL-3497: removed, requires radically different settings approach

* TODO FL-3514: removed, yes we should

* TODO FL-3498: implemented, guarding view port access with mutex.

* TODO FL-3515: removed, questionable but ok

* TODO FL-3510: removed, comment added

* TODO FL-3500: refactored, store pin numbers in GpioPinRecord, fix gpio app crash caused by incorrect gpio_pins traversal.

* Format Sources

* TODO FL-3505: removed, mutex alone is not going to fix issue with WPAN architecture

* TODO FL-3506: removed, change ownership by copy is good

* TODO FL-3519: documentation and link to source added

* Lib: remove unneded total sum from comment in bq27220

---------

Co-authored-by: hedger <hedger@users.noreply.github.com>

applications/services/power/power_service/power.c

@@ -30,7 +30,7 @@ void power_draw_battery_callback(Canvas* canvas, void* context) {
         if(power->state == PowerStateCharging) {
             canvas_set_bitmap_mode(canvas, 1);
             canvas_set_color(canvas, ColorWhite);
-            // TODO FL-3510: replace -1 magic for uint8_t with re-framing
+            // -1 used here to overflow u8 number and render is outside of the area
             canvas_draw_icon(canvas, 8, -1, &I_Charging_lightning_mask_9x10);
             canvas_set_color(canvas, ColorBlack);
             canvas_draw_icon(canvas, 8, -1, &I_Charging_lightning_9x10);