add view_mode, line space and font weight setting to readerconfig

frontend/ui/creoptions.lua

@@ -2,6 +2,19 @@ CreOptions = {
 	prefix = 'copt',
 	default_options = {
 	},
+	{
+		icon = "resources/icons/appbar.column.two.large.png",
+		options = {
+			{
+				name = "line_spacing",
+				name_text = "Line Spacing",
+				item_text = {"decrease", "increase"},
+				args = {"decrease", "increase"},
+				default_arg = nil,
+				event = "ChangeLineSpace",
+			},
+		}
+	},
 	{
 		icon = "resources/icons/appbar.text.size.large.png",
 		options = {
@@ -17,5 +30,33 @@ CreOptions = {
 			},
 		}
 	},
+	{
+		icon = "resources/icons/appbar.grade.b.large.png",
+		options = {
+			{
+				name = "font_weight",
+				name_text = "Font weight",
+				item_text = {"toggle bolder"},
+				-- args is indeed not used, we put here just to keep the
+				-- UI happy.
+				args = {1},
+				default_arg = nil,
+				event = "ToggleFontBolder",
+			}
+		}
+	},
+	{
+		icon = "resources/icons/appbar.settings.large.png",
+		options = {
+			{
+				name = "view_mode",
+				name_text = "View mode",
+				item_text = {"scroll", "page"},
+				args = {"scroll", "page"},
+				default_arg = "page",
+				event = "SetViewMode",
+			},
+		}
+	},
 }