refactored the way we handle feed refresh queue
removed unused urlHash field
don't fetch the whole content, just return the id if it does
index for entry lookup
use default thread factory
fix feed cleanup
Translated new labels to Swedish

woop woop in da boop
Merge pull request #465 from LpSamuelm/patch-16

Translated new labels to Swedish
reduce cache size
limit queue sizes
Update fi.properties
Merge pull request #466 from JKakku/patch-1

Update fi.properties
Update zh.properties
added comments for refill()
configurable feed refresh interval
fix error when emitting event without payload
Merge pull request #467 from yxd-works/patch-3

Update zh.properties
increase batch size
more push callback checks
use ApplicationPropertiesService