Make user-chosen presence priority higher than other presence.
Make user-chosen presence priority higher than other presence.

Change the global current presence algorithm to use the presence
same as global requested presence if there is at least one account
with such presence, otherwise it will fallback to the old algorithm.

REVIEW: 112875

KDE/ktp-common-internals,KDE/ktp-common-internals,leonhandreke/ktp-common-internals,KDE/ktp-common-internals,leonhandreke/ktp-common-internals,leonhandreke/ktp-common-internals