[Differential] [Updated] D857: Revert code completion changes

[kfunk (Kevin Funk)]

kfunk added reviewers: mwolff, olivierjg.

REPOSITORY
  rKDEVPLATFORM KDevPlatform

REVISION DETAIL
  https://phabricator.kde.org/D857

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To: kfunk, mwolff, olivierjg
Cc: kdevelop-devel