If we always choose `0` as the default value for `endVal` in case it is
not given (maybe apollo assigns null when the request is in flight) then
just make `0` the default.
- was throwing an error when trying to update commentsCount because of new implementation by @roschaefer which uses countResolver, but there was no related for commentsCount, it was r... also commentsCount is no longer needed anywhere in the code base, it is commentedCount now
@ulfgebhardt I refactored the mixin because it's not enough code to
justify the additional complexity. If it's just two lines of code, I
find it the best solution to use a computed property.
You can use components and computed properties excessively, they tend to
be easier to maintain in the long run.
