ModalisDismissible()shouldprotectthemodalfromclosingbypressingEsc

Changes proposed in this pull request:
- js/src/common/components/ModalManager.js

Reviewers should focus on:
By default Bootstrap Modal does not prevent modal from closing when you press Esc, even if backdrop: 'static' is enabled. keyboard: false required.

Confirmed

• [x] Frontend changes: tested on a local Flarum installation.


• [ ] Backend changes: tests are green (run
  

  1	composer test

  ).

该提问来源于开源项目：flarum/core