git-gui: Focus insertion point at end of strings in repository chooser

When selecting a local working directory for a new repository or a
location to clone an existing repository into we now set the insert
point at the end of the selected path, allowing the user to type in
any additional parts of the path if they so desire.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

lib/choose_repository.tcl

@@ -11,6 +11,7 @@ field w_quit      ; # Quit button
 field o_cons      ; # Console object (if active)
 field w_types     ; # List of type buttons in clone
 field w_recentlist ; # Listbox containing recent repositories
+field w_localpath  ; # Entry widget bound to local_path
 
 field done              0 ; # Finished picking the repository?
 field local_path       {} ; # Where this repository is locally
@@ -385,6 +386,7 @@ method _do_new {} {
 	button $w_body.where.b \
 		-text [mc "Browse"] \
 		-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
@@ -416,6 +418,7 @@ method _new_local_path {} {
 		return
 	}
 	set local_path $p
+	$w_localpath icursor end
 }
 
 method _do_new2 {} {
@@ -481,6 +484,7 @@ method _do_clone {} {
 		-text [mc "Browse"] \
 		-command [cb _new_local_path]
 	grid $args.where_l $args.where_t $args.where_b -sticky ew
+	set w_localpath $args.where_t
 
 	label $args.type_l -text [mc "Clone Type:"]
 	frame $args.type_f