some minor cleanups

* Suppress warnings about conflicting library names in platformio.ini by
  explicitly picking the libraries by id that we want.
* fix unused static function warning by making it not static ;)
* declare arduino-fsm as dependency for BluetoothOTA. Hopefully this
  fixes the CI builds?

Tested: `pio run` builds.

src/PowerFSM.h

@@ -1,6 +1,6 @@
 #pragma once 
 
-#include "Fsm.h"
+#include <Fsm.h>
 
 // See sw-design.md for documentation
 
@@ -16,4 +16,4 @@
 
 extern Fsm powerFSM;
 
-void PowerFSM_setup();
+void PowerFSM_setup();

src/screen.cpp

@@ -510,7 +510,7 @@ void Screen::setOn(bool on)
     }
 }
 
-static void screen_print(const char *text, uint8_t x, uint8_t y, uint8_t alignment)
+void screen_print(const char *text, uint8_t x, uint8_t y, uint8_t alignment)
 {
     DEBUG_MSG(text);
 
@@ -709,4 +709,4 @@ void Screen::onPress()
         targetFramerate = TRANSITION_FRAMERATE;
         ui.setTargetFPS(targetFramerate);
     }
-}
+}

src/screen.h

@@ -3,6 +3,7 @@
 #include "PeriodicTask.h"
 
 void screen_print(const char * text);
+void screen_print(const char * text, uint8_t x, uint8_t y, uint8_t alignment);
 
 
 // Show the bluetooth PIN screen
@@ -36,4 +37,4 @@ public:
     void onPress();
 };
 
-extern Screen screen;
+extern Screen screen;