D7495: Do not start reloading again if we're reloading

[Albert Astals Cid]

aacid created this revision.
Restricted Application added a subscriber: Okular.
Restricted Application added a project: Okular.

REVISION SUMMARY
  If you press and hold https://phabricator.kde.org/F5 we try to reload multiple times, which isn't a nice idea, let's finish one before starting the next

REPOSITORY
  R223 Okular

BRANCH
  Applications/17.08

REVISION DETAIL
  https://phabricator.kde.org/D7495

AFFECTED FILES
  part.cpp
  part.h

To: aacid
Cc: #okular, aacid
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