separate interval settings for submitted share alert, hashing speed and stale rate

[jianershi]

for the stale rate, won't it make more sense if it is daily or even lifetime instead of default interval 1h?
but for submitted share alert, i would probably like 5min. to check whether one card is down.
for hashing speed, 15min will be fine.

so I recommend separate interval settings for submitted share alert, hashing speed and stale rate.