* always show empty line at bottom of the tag list to allow adding more tags (replaces `+` button and tab logic)
* disable delete and info buttons on empty tag
* replace deferring of tag change events and re-rendering with a simpler logic (to fix issues like #10871):
only set input field values if the rendering event was triggered by an external event, or by a change of the respective field in the raw tag editor itself
* skip delete and tag info buttons while navigating using tab: makes it more quick to get to where one typically needs to, deleting a key using the keyboard only is possible by emptying the tag's key, and advanced users are not typically using the `i` button anyway
* preserve the sum of certain tags (`step_count`, `parking:*:capacity`) during _join_ operation
* preserve total value of `parking:*:capacity` tags during _split_ operation by distributing it proportionally to the resulting ways
* the abstract osm entity now accepts a list of tags to override during the merging, but otherwise is agnostic about how tags can be merged: the concrete merging resolution might depend on the concrete action that was performed
fixes#10186, where features with e.g. `intermittent=yes` were incorrectly sorted into the past/futures layer
now only features with correct tagging are included in the "past/futures" layer:
* either the "legacy" lifecycle tagging (e.g. `highway=construction`)
* or proper lifecycle prefix tags (e.g. `disused:shop=convenience`)
full list of enhancements:
* year slider to filter photos by freshness
* toggle active streetlevel layers with shortcut `shift+P`
* hfov, pitch and direction is now held between sequences and images as asked in #10392
* fix for #10361 (only panoramax)
* added tests and jsdoc
* add ticks for existing photos on slider
* general bug fixes
* rudimentary support for toDate in date slider (only when iD is started with a "to" date in the hash parameter: show a second slider to visualize and set the "to" date)
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Co-authored-by: Martin Raifer <martin@raifer.tech>
* zoom/x/y – copy/paste from an osm.org URL or web map with map-hash param (this also sets map zoom to the respective value)
* x/y – like the above, but does not set zoom level
* x y – where x and y are numbers in the user's locale's number format
* retry all unsuccessful map calls after waiting 8 seconds (spinner continues to indicate loading state)
* also logged-in users can be rate limited: add dedicated error message
* don't log users out when requests return 401/403 (except on the _get own user data_ request, which would indicate that the oauth token was revoked): it's better to show the error message if a legitimate api call was actually unauthorized
closes#10299
* add validation & fix for way vertices limit imposed by OSM API (try to choose splitting locations at existing intersection vertices if possible)
* fix splitting of closed ways at two or more nodes:
this bug resulted sometimes in one extra split point in the result, or one of the split vertices to be left unsplit
