Update StringDictionary.de.xaml

[Kasukoi]

Should be everything here. Remaining English words like "Login" are commonly used in the German language so there should be no need to change them.

[Stanly5]

@Kasukoi
Thank you so much for your contribution.
I'd like to share the screen shot for reviewing before release test version of translation, even few screen. If you find something to be improved or changed, then issuing Pull request again would be greatly appreciated.

[Kasukoi]

When adding a new Drive (Neues Laufwerk), the "Passwort" next to the "Benutzername" seems to be missing. Other than that, everything seems to be fine!

[Stanly5]

Thanks for quick reviewing!
Probably there was something problem at that time. After re-start it looks fine.
Please see below.

For your information, about cut off of "Schreibgeschützt", we will adjust it.

[Stanly5]

String line for Proxy was added, and I made it tentatively like below.
Could you please review it is ok or not?

<system:String x:Key="Settings.Proxy">Proxy</system:String>

[Stanly5]

@Kasukoi
RaiDrive 1.4.0 is released. With your great contribution, translated German is applied on it and also new file can be tested with it.