Umlaut Bug in metadata key:value pairs

[dev4223]

Hello Martin,

First thanx for your great project. Best todo.txt-App!

I have an issue with the metadata key:value pairs. When key contains a special character the following ist happening:

1. for input Lösung:Konzept it reads L sung: Konzept
2. for input Lösúng:Konzept it reads Lös ng: Konzept

Best regards,
Holger

[MartinSGill]

Checked the standard and you're right I should be supporting this.
Turns out though it's not as easy to fix as I thought because of the way I render the entry as HTML and do the formatting.

It will need more work than expected.