Fixed the failure to edit alias name and epg name on bouquet creation when trying to use the keypad and not the virtual keyboard.

School boy error on my behalf. I needed to add fixed_size=False. Which i had added on all the other settings pages, but missed it out on this one. doh.

Tweaked file reading/writing as one particular external m3u playlist I was testing was throwing up a read/write conflict. I think it was processing it too fast, so trying to do too many things at once.