v5.0.13

[rel-v5r0]

FIX: (#799) Replace pkg_resources with importlib
FIX: (#798) Correct logic in time selection panel
FIX: (#798) Hide top-level scrollbar on wrongly sized panels
FIX: (#798) Prefer https wherever possible, remove insecure iframe
FIX: (#798) Enabled websocket ping keepalive
FIX: (#798) Lower log level for KeyError in ConfigManager bulk config get