Dispatcher: add word spacing & expansion

frontend/dispatcher.lua

@@ -172,6 +172,8 @@ local settingsList = {
     line_spacing = {category="absolutenumber", rolling=true, separator=true},
     font_size = {category="absolutenumber", title=_("Set font size"), rolling=true, step=0.5},
     font_base_weight = {category="string", rolling=true},
+    word_spacing = {category="string", rolling=true},
+    word_expansion = {category="string", rolling=true},
     font_gamma = {category="string", rolling=true},
     font_hinting = {category="string", rolling=true},
     font_kerning = {category="string", rolling=true, separator=true},
@@ -323,6 +325,8 @@ local dispatcher_menu_order = {
     "increase_font",
     "decrease_font",
     "font_size",
+    "word_spacing",
+    "word_expansion",
     "font_gamma",
     "font_base_weight",
     "font_hinting",