removed side menu from display options, kept overrides in display options, moved thresholds and time regions to its own section in visualization

Datasource settings isdefault

add icon

Portal component

Small tooltip css-adjustments and add css for position "bottom-start"…

Create a portal and use it with our popper component (tooltip and popover) to avoid potential overflow-/zindex-bugs

Update css to use the border-radius variable and add a new variable for the popper's distance to its ref

Readme: We should write Node.js the same way in all places in the readme

Develop keep panel settings when switching visualizations

redact value for plugin proxy routes

JS tooling: upgrade to babel 7

Explore: Display duplicate row count as number

Small tooltip css-adjustments and add css for position "bottom-start" used by the panel header corner

Gauge value options

- the pips were hard to see
- make it really clear which rows are duplicates by allocating a column to show number

Explore: Logging query live preview of matches

A logging query has a selector part and a regexp. The regexp matches are highlighted when results return.
This change adds live preview to matches when modifying the regexp in a search field.

- delegate retrieval of match query to datasource
- datasource returns search expressions to be used to highlight a live preview of matches
- logs row now takes preview highlights
- logs row renders preview highlights with dotted line to distinguish from query run matches (solid line)
- fix react-highlight-words version to ensure custom chunk matcher
- custom chunk matcher can now also take incomplete regexps, eg, `(level` without inifinte looping
- perf: debounce of live preview to 500ms
- perf: only top 100 rows get the live preview
- preview is only supported with one query row (multiple rows semantic makes this tricky: regexp for row n should only filter results for query n)

only make it possible to scan for older logs if there is at least one…

Misc styling fixes to explore

Add VizPicker search

Let the cached props from previous visualization be the masters, unless specified in keepLatestProps const