With UTC enabled, the absolute date range picker still capped the
calendar at the local `new Date()`. When the local date was a day
behind UTC, today's UTC date was disabled and could not be picked.
Convert the max date with `getUtcToSystem` when `utc` is set, the
same conversion the selector already applies to the start and end
dates.
Clicking a value in the tag details drawer built the search as
`key:"value"` with the raw tag key. For a custom tag named after a
reserved search key, like `project_id`, the events page searched the
built-in field instead of the tag and errored.
Escape the key with `escapeIssueTagKey`, which the value actions menu
in the same file already uses, so the link becomes
`tags[project_id]:"value"`.
dualfroz