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_delete.tcl

@@ -9,7 +9,7 @@ field w_check         ; # revision picker for merge test
 field w_delete        ; # delete button
 
 constructor dialog {} {
-	global current_branch use_ttk NS
+	global current_branch
 
 	make_dialog top w
 	wm withdraw $w
@@ -18,25 +18,25 @@ constructor dialog {} {
 		wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
 	}
 
-	${NS}::label $w.header -text [mc "Delete Local Branch"] \
+	ttk::label $w.header -text [mc "Delete Local Branch"] \
 		-font font_uibold -anchor center
 	pack $w.header -side top -fill x
 
-	${NS}::frame $w.buttons
+	ttk::frame $w.buttons
 	set w_delete $w.buttons.delete
-	${NS}::button $w_delete \
+	ttk::button $w_delete \
 		-text [mc Delete] \
 		-default active \
 		-state disabled \
 		-command [cb _delete]
 	pack $w_delete -side right
-	${NS}::button $w.buttons.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
 
-	${NS}::labelframe $w.list -text [mc "Local Branches"]
+	ttk::labelframe $w.list -text [mc "Local Branches"]
 	set w_heads $w.list.l
 	slistbox $w_heads \
 		-height 10 \