D8154: Minor spell check interface fixes

[Christoph Roick]

croick created this revision.
croick added a reviewer: KTextEditor.
Restricted Application added projects: Kate, Frameworks.
Restricted Application added a subscriber: Frameworks.

REVISION SUMMARY
  - empty document does not resize bar widget when spell check is started without effect
  - replacing the last word with an empty text does not leave the progress bar open
  - show first suggestion in suggestion combo box
  - clear replace-all-list when checking is finished

TEST PLAN
  - perform spell check on empty document
  - replace trailing misspelled word in document with empty string
  - recheck spelling of former "Replace All" word

REPOSITORY
  R39 KTextEditor

BRANCH
  spellfixes

REVISION DETAIL
  https://phabricator.kde.org/D8154

AFFECTED FILES
  src/spellcheck/spellcheckbar.cpp
  src/spellcheck/spellcheckdialog.cpp

To: croick, #ktexteditor
Cc: #frameworks, cullmann, sars, dhaumann
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