D24006: Remove the usage of "null backend"

[Alexander Semke]

asemke updated this revision to Diff 67827.
asemke added a comment.


  This patch seems to cause somewhat different timings in testworkseet which leads to a crash and wrong results. The problems seems to be because of parallelized execution of the tests here which is not completely clear. The new diff
  
  - avoids the crash
  - increases the wait time in the math renderer to get the proper result

REPOSITORY
  R55 Cantor

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D24006?vs=66261&id=67827

REVISION DETAIL
  https://phabricator.kde.org/D24006

AFFECTED FILES
  src/cantor.cpp
  src/cantor.h
  src/cantor_part.cpp
  src/main.cpp
  src/mathrendertask.cpp
  src/mathrendertask.h
  src/test/worksheet_test.cpp
  src/worksheet.cpp
  src/worksheet.h

To: asemke, sirgienko, filipesaraiva
Cc: kde-edu, narvaez, apol
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