Merge https://github.com/prati0100/git-gui

* https://github.com/prati0100/git-gui:
  git-gui: allow opening currently selected file in default app
  git-gui: allow closing console window with Escape
  git gui: fix branch name encoding error
  git-gui: revert untracked files by deleting them
  git-gui: update status bar to track operations
  git-gui: consolidate naming conventions

git-gui/lib/checkout_op.tcl

@@ -341,9 +341,9 @@ method _readtree {} {
 	global HEAD
 
 	set readtree_d {}
-	$::main_status start \
+	set status_bar_operation [$::main_status start \
 		[mc "Updating working directory to '%s'..." [_name $this]] \
-		[mc "files checked out"]
+		[mc "files checked out"]]
 
 	set fd [git_read --stderr read-tree \
 		-m \
@@ -354,26 +354,27 @@ method _readtree {} {
 		$new_hash \
 		]
 	fconfigure $fd -blocking 0 -translation binary
-	fileevent $fd readable [cb _readtree_wait $fd]
+	fileevent $fd readable [cb _readtree_wait $fd $status_bar_operation]
 }
 
-method _readtree_wait {fd} {
+method _readtree_wait {fd status_bar_operation} {
 	global current_branch
 
 	set buf [read $fd]
-	$::main_status update_meter $buf
+	$status_bar_operation update_meter $buf
 	append readtree_d $buf
 
 	fconfigure $fd -blocking 1
 	if {![eof $fd]} {
 		fconfigure $fd -blocking 0
+		$status_bar_operation stop
 		return
 	}
 
 	if {[catch {close $fd}]} {
 		set err $readtree_d
 		regsub {^fatal: } $err {} err
-		$::main_status stop [mc "Aborted checkout of '%s' (file level merging is required)." [_name $this]]
+		$status_bar_operation stop [mc "Aborted checkout of '%s' (file level merging is required)." [_name $this]]
 		warn_popup [strcat [mc "File level merge required."] "
 
 $err
@@ -384,7 +385,7 @@ $err
 		return
 	}
 
-	$::main_status stop
+	$status_bar_operation stop
 	_after_readtree $this
 }