Migrate more prints and graphics.len calls to font::

I especially focused on graphics.len and the print calls around them,
because graphics.len calls appear a bit less often, might be overlooked
when migrating print calls (thus possibly using different fonts by
accident) and are often used for some kind of right-alignment or
centering which can be changed into PR_RIGHT or PR_CEN with a different
X anyway.

Notably, I also added a new function to generate these kinds of
sliders: ....[]............

Different languages means that the slider for analogue stick
sensitivity needs to be longer to fit possibly long words for
Low/Medium/High, and then different font sizes means that the longer
slider won't fit onscreen in a language that needs a 12-wide font. So
slider_get() can take a "target width", which dynamically changes the
number of characters depending on the width of them in the interface
font.

I kinda forgot that I could force the 8x8 font instead of adapting the
characters in the slider to the font, and other ideas (like using
different characters or a more graphical progress bar) have been
brought up on Discord, so this might all change again sooner or later.

desktop_version/src/Font.cpp

@@ -465,6 +465,7 @@ void destroy(void)
     unload_font_container(&fonts_main);
 }
 
+static Font* container_get(FontContainer* container, uint8_t idx); // TODO TEMP TEMP TEMP
 
 static bool next_wrap(
     size_t* start,
@@ -493,7 +494,7 @@ static bool next_wrap(
             goto next;
         }
 
-        linewidth += get_advance(&fonts_main.fonts[font_idx_8x8], str[idx]); // TODO get font via argument!
+        linewidth += get_advance(container_get(&fonts_main, loc::get_langmeta()->font_idx), str[idx]); // TODO get font via argument!
 
         switch (str[idx])
         {