Merge branch 'master' of https://github.com/j6t/git-gui

* 'master' of https://github.com/j6t/git-gui: (26 commits)
  git-gui: eliminate _search_exe
  git-gui: remove procs gitexec and _git_cmd
  git-gui: use dashless 'git cmd' form for read/write
  git-gui: default to full copy for linked worktrees
  git-gui: use git-clone
  git-gui: remove non-ttk code
  git-gui: remove ${NS} indirection for ttk
  git-gui: always use themed widgets from ttk
  git-gui: remove redundant check for Tk >= 8.5
  git-gui: remove unreachable Tk 8.4 code
  git-gui: remove unused git-version
  git-gui: use git_init to create new repository dir
  git-gui: git-remote is always available
  git-gui: git merge understands --strategy=recursive
  git-gui: git-diff knows submodules and textconv
  git-gui: git-blame understands -w and textconv
  git-gui: git rev-parse knows show_toplevel
  git-gui: use git-branch --show-current
  git-gui: git-diff-index always knows submodules
  git-gui: git ls-files knows --exclude-standard
  ...

git-gui/lib/branch_checkout.tcl

@@ -10,7 +10,6 @@ field opt_fetch     1; # refetch tracking branch if used?
 field opt_detach    0; # force a detached head case?
 
 constructor dialog {} {
-	global use_ttk NS
 	make_dialog top w
 	wm withdraw $w
 	wm title $top [mc "%s (%s): Checkout Branch" [appname] [reponame]]
@@ -18,16 +17,16 @@ constructor dialog {} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 	}
 
-	${NS}::label $w.header -text [mc "Checkout Branch"] \
+	ttk::label $w.header -text [mc "Checkout Branch"] \
 		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	${NS}::frame $w.buttons
-	${NS}::button $w.buttons.create -text [mc Checkout] \
+	ttk::frame $w.buttons
+	ttk::button $w.buttons.create -text [mc Checkout] \
 		-default active \
 		-command [cb _checkout]
 	pack $w.buttons.create -side right
-	${NS}::button $w.buttons.cancel -text [mc Cancel] \
+	ttk::button $w.buttons.cancel -text [mc Cancel] \
 		-command [list destroy $w]
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
@@ -36,14 +35,14 @@ constructor dialog {} {
 	$w_rev bind_listbox <Double-Button-1> [cb _checkout]
 	pack $w.rev -anchor nw -fill both -expand 1 -pady 5 -padx 5
 
-	${NS}::labelframe $w.options -text [mc Options]
+	ttk::labelframe $w.options -text [mc Options]
 
-	${NS}::checkbutton $w.options.fetch \
+	ttk::checkbutton $w.options.fetch \
 		-text [mc "Fetch Tracking Branch"] \
 		-variable @opt_fetch
 	pack $w.options.fetch -anchor nw
 
-	${NS}::checkbutton $w.options.detach \
+	ttk::checkbutton $w.options.detach \
 		-text [mc "Detach From Local Branch"] \
 		-variable @opt_detach
 	pack $w.options.detach -anchor nw