Merge branch 'develop-1.8' of https://github.com/kepler155c/opus into develop-1.8

sys/apps/shell.lua

@@ -3,6 +3,7 @@ local parentShell = _ENV.shell
 _ENV.shell = { }
 
 local fs         = _G.fs
+local settings   = _G.settings
 local shell      = _ENV.shell
 
 local sandboxEnv = setmetatable({ }, { __index = _G })
@@ -673,6 +674,10 @@ local history = History.load('usr/.shell_history', 25)
 term.setBackgroundColor(_colors.backgroundColor)
 term.clear()
 
+if settings.get("motd.enabled") then
+	shell.run("motd")
+end
+
 while not bExit do
 	if config.displayDirectory then
 		term.setTextColour(_colors.directoryTextColor)

sys/modules/opus/ui/components/Form.lua

@@ -100,6 +100,7 @@ function UI.Form:validateField(field)
 		end
 	end
 	if field.validate == 'numeric' then
+		field.value = field.value or ''
 		if #tostring(field.value) > 0 then
 			if not tonumber(field.value) then
 				return false, 'Invalid number'