Update keepassx_de.ts

improvable version of translationfile (english -> german)
You might suggest this in a separate issue if you think the English term needs changing. The problem is going to be that a recognizable term is probably going to be wrong because it isn't a well known software pattern. For example your first two suggestions are quite wrong: it specifically has nothing to do with paste (that's the system it's avoiding!) and it's not at all the some sort of feature as what is commonly called auto-fill in other software. Those terms are recognizable but they don't work for this because the feature is specifically NOT related to things that people are going to recognize.

"Direct-fill" might work, although I'm not sure how much better it is that "auto-type" which at least links they idea to keyboard functionality, which is related to how it works.