[Feat]: Ability to negatively filter

[ralphm]

Problem

Excluding a value for a facet from the filtering result currently requires selecting all values and then unchecking the unwanted value. This is tedious and doesn't take new values into account.

Description

Besides positive filtering (checking the values that should match), negative filtering (only match if it doesn't have this value) can greatly improve troubleshooting over time.

Importance

really want

Value proposition

1. Quicker troubleshooting by excluding things of no interest.

Proposed implementation

Negative filtering should apply to all places that expose a filter:

• Global node filter
• Filtering side bar in the Nodes tab
• Filtering side bar in the Alerts tab
• Filtering side bar in the Events tab

Additionally, hot words in item lists (including Events, Alerts, Logs) should gain +/- operators next to them for quick inclusion or exclusion filtering (as described here.