git-gui: don't hide the Browse button when resizing the repo chooser

Rather shrink the input field for "Create New Repository" and "Open
Existing Repository" as it's already done for "Clone Existing
Repository".
Signed-off-by: NMarkus Heidelberg <markus.heidelberg@web.de>
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>

lib/choose_repository.tcl

@@ -398,6 +398,8 @@ method _do_new {} {
 	grid $w_body.where.l $w_body.where.t $w_body.where.b -sticky ew
 	pack $w_body.where -fill x
 
+	grid columnconfigure $w_body.where 1 -weight 1
+
 	trace add variable @local_path write [cb _write_local_path]
 	bind $w_body.h <Destroy> [list trace remove variable @local_path write [cb _write_local_path]]
 	update
@@ -998,6 +1000,8 @@ method _do_open {} {
 	grid $w_body.where.l $w_body.where.t $w_body.where.b -sticky ew
 	pack $w_body.where -fill x
 
+	grid columnconfigure $w_body.where 1 -weight 1
+
 	trace add variable @local_path write [cb _write_local_path]
 	bind $w_body.h <Destroy> [list trace remove variable @local_path write [cb _write_local_path]]
 	update