## Context

The gutter hover button can represent either adding a breakpoint or
adding a bookmark depending on whether the secondary modifier is
pressed. Previously, the visible tooltip did not update when the
modifier changed while the popover was already open. This moves the
gutter hover intent into a shared state used by both the button and
tooltip, so the label, metadata, icon, color, click action, and
displayed keybinding all stay in sync.

Closes #58821

## How to Review

`crates/editor/src/editor.rs` adds a shared gutter hover intent type and
a custom tooltip view that reads the current modifier state while
rendering. Review that bookmark and breakpoint behavior map consistently
across the button icon/color, click action, tooltip label, metadata, and
keybinding.

`crates/editor/src/editor_tests.rs` adds a regression test covering the
tooltip intent selection with and without the secondary modifier.

Manual test after the fix below :

[Screencast from 2026-06-09
01-30-23.webm](https://github.com/user-attachments/assets/ef465eb9-e659-44da-93a6-a511c84e9401)

## Self-Review Checklist

- [x] I've reviewed my own diff for quality, security, and reliability
- [ ] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the UI/UX checklist
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- Fixed the breakpoint/bookmark gutter popover not updating when
modifier keys change.

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Co-authored-by: Danilo Leal <daniloleal09@gmail.com>