Tracker: Remove extra space between pose controls and buttons.

Now that the scrollbar is part of the pose area, we no longer
have to include its height in the spacing of the pose view
from the buttons and the bottom of the window.

Mentioned by X512 in #16368.

src/kits/tracker/FilePanelPriv.cpp

@@ -749,7 +749,7 @@ TFilePanel::Init(const BMessage*)
 
 	rect = windRect;
 	rect.OffsetTo(10, fDirMenuField->Frame().bottom + 10);
-	rect.bottom = windRect.bottom - 60;
+	rect.bottom = windRect.bottom - 46;
 	rect.right -= 20;
 	fPoseContainer->MoveTo(rect.LeftTop());
 	fPoseContainer->ResizeTo(rect.Width(), rect.Height());