Power subsystem improvements and bug fixes (#353)

* BT: render icon statically.
* Move API HAL Power init call to api_hal_init.
* API HAL Power: replace stop2 mode with stop1 to ensure usb and lptim2 proper work.

applications/bt/bt.c

@@ -8,9 +8,8 @@ Bt* bt_alloc() {
     bt->gui = furi_record_open("gui");
     bt->menu = furi_record_open("menu");
 
-    bt->statusbar_icon = assets_icons_get(I_Bluetooth_5x8);
     bt->statusbar_view_port = view_port_alloc();
-    view_port_set_width(bt->statusbar_view_port, icon_get_width(bt->statusbar_icon));
+    view_port_set_width(bt->statusbar_view_port, 5);
     view_port_draw_callback_set(bt->statusbar_view_port, bt_draw_statusbar_callback, bt);
     view_port_enabled_set(bt->statusbar_view_port, false);
     gui_add_view_port(bt->gui, bt->statusbar_view_port, GuiLayerStatusBarLeft);
@@ -24,9 +23,7 @@ Bt* bt_alloc() {
 }
 
 void bt_draw_statusbar_callback(Canvas* canvas, void* context) {
-    assert(context);
-    Bt* bt = context;
-    canvas_draw_icon(canvas, 0, 0, bt->statusbar_icon);
+    canvas_draw_icon_name(canvas, 0, 0, I_Bluetooth_5x8);
 }
 
 void bt_cli_info(string_t args, void* context) {

applications/bt/bt_i.h

@@ -18,7 +18,6 @@ typedef struct {
     Gui* gui;
     ValueMutex* menu;
     // Status bar
-    Icon* statusbar_icon;
     ViewPort* statusbar_view_port;
     // Menu
     Icon* menu_icon;