Also move Lua scripts to share subfolder

share/scripts/mute_all_tracks.lua

@@ -0,0 +1,21 @@
+ardour {
+	["type"]    = "EditorAction",
+	name        = "Mute All Tracks",
+	license     = "MIT",
+	author      = "Ardour Team",
+	description = [[Mute All Tracks in the Session]]
+}
+
+function factory () return function ()
+	local ctrls = ARDOUR.ControlListPtr () -- create a list of controls to change
+
+	for r in Session:get_tracks ():iter () do -- iterate over all tracks in the session
+		ctrls:push_back (r:mute_control()) -- add the track's mute-control to the list of of controls to be changed
+	end
+
+	-- of more than one control is to be changed..
+	if ctrls:size() > 0 then
+		-- do it (queue change in realtime-context) set to "1" ; here 'muted'
+		Session:set_controls (ctrls, 1, PBD.GroupControlDisposition.NoGroup)
+	end
+end end