Two minor tweaks on git-gui where textboxes weren't vertically centered with their labels and buttons

[Twiinz <twiinz@gmail.com>]

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In git-gui after clicking either on 'Create New Repository' or 'Open
Existing Repository' the form elements aren't centered like they are
pretty much everywhere else in the app. At least when ran on a mac,
haven't checked on other platforms.

Using grid instead of pack seems to fix this.

Hope that helps, cheers,
/twiinz

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--- choose_repository.old.tcl	2008-05-18 11:54:23.000000000 +0700
+++ choose_repository.tcl	2008-05-18 11:56:41.000000000 +0700
@@ -388,9 +388,7 @@ method _do_new {} {
 		-command [cb _new_local_path]
 	set w_localpath $w_body.where.t
 
-	pack $w_body.where.b -side right
-	pack $w_body.where.l -side left
-	pack $w_body.where.t -fill x
+	grid $w_body.where.l $w_body.where.t $w_body.where.b -sticky ew
 	pack $w_body.where -fill x
 
 	trace add variable @local_path write [cb _write_local_path]
@@ -987,9 +985,7 @@ method _do_open {} {
 		-text [mc "Browse"] \
 		-command [cb _open_local_path]
 
-	pack $w_body.where.b -side right
-	pack $w_body.where.l -side left
-	pack $w_body.where.t -fill x
+	grid $w_body.where.l $w_body.where.t $w_body.where.b -sticky ew
 	pack $w_body.where -fill x
 
 	trace add variable @local_path write [cb _write_local_path]