WebUI Queries Processing Refined

Features

• DHMS format for the duration queries: 20d3m1.25 means 20 days 3 minute 1.25 sec
• Default values for the range bounds added +/-inf: 1.. is the same as 1..inf

Fixes

• Duration displayed for the running tasks
• Tasks processing with sub-sub+ jobs
• Queries parsing for various cases
• WebUI errors reporting refined