fix monitorEnabled for getHotKeysEpic

[ArgusLi]

Description

This PR changes 3 things with monitor with relation to hotKeys:

• Hot Keys checks if monitor is enabled as a fallback to get the hot keys. However, it accesses a value that doesn't exist. This fix replaces that with the exported function selectMonitorRunning().
• Previously useMonitor (used by hotKeys) starts and stops the monitor. Monitor's lifecycle should be controlled purely by the monitor endpoint. This fix changes useMonitor to purely return monitor data.
• willCompleteAt within the monitor response was not being updated based on cycles. i.e. it was set in the first run to be Date.now() + monitoring duration, then never updated again. This fix updates willCompleteAt for each cycle.