Component InputUnsignedInt.vue does not accept return key to start search for LookupASN

[bernhardreiter]

v0.8.0 when entering a number in the Contacts - LookupASN field and pressing the "return" key
on the keyboard, no search is initiated. This is different to the other searches and should be changed to be consistent, because sometimes the user believes the result of the inputs are already shown.

The funcationalits is implemented in a custom component components/dash/InputUnsignedInt.vue .