Transfer adjust call to applyposition

This transfers the responsibility of the adjust() call to
applyposition().

This is because cutscene text boxes (TEXTTRANSLATE_CUTSCENE) will have
adjust() called, but all other text boxes won't. And I can't place the
adjust() call inside applyposition(), because adjust() also calls
applyposition(), and that leads to an infinite loop which leads to a
stack overflow, so I had to remove the applyposition() call from
adjust(), and replace the other existing call to
Graphics::textboxadjust() with Graphics::textboxapplyposition(), and
then remove Graphics::textboxadjust() function because it's no longer
used.

desktop_version/src/Script.cpp

@@ -766,7 +766,7 @@ void scriptclass::run(void)
                 }
                 graphics.textboxtranslate(TEXTTRANSLATE_CUTSCENE, NULL);
 
-                graphics.textboxadjust();
+                graphics.textboxapplyposition();
                 if (words[0] == "speak_active")
                 {
                     graphics.textboxactive();