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/Textbox.cpp

@@ -87,12 +87,15 @@ void textboxclass::applyposition(void)
     {
         centery();
     }
+    if (translate == TEXTTRANSLATE_CUTSCENE)
+    {
+        adjust();
+    }
 }
 
 void textboxclass::adjust(void)
 {
     resize();
-    applyposition();
     if (xp < 10) xp = 10;
     if (yp < 10) yp = 10;
     if (xp + w > 310) xp = 310 - w;