Fixes several usability issues with QueryField component (#18681)

* Fixes several usability issues with QueryField component
- Can now indent with tab and `mod+[`, `mod+]`
- Copy/Cut preserves new lines, and paste correctly splits blocks now
- Adds support for selection hotkeys

package.json

@@ -26,6 +26,7 @@
     "@types/enzyme-adapter-react-16": "1.0.5",
     "@types/expect-puppeteer": "3.3.1",
     "@types/file-saver": "2.0.1",
+    "@types/is-hotkey": "0.1.1",
     "@types/jest": "24.0.13",
     "@types/jquery": "1.10.35",
     "@types/lodash": "4.14.123",
@@ -203,6 +204,7 @@
     "fast-text-encoding": "^1.0.0",
     "file-saver": "1.3.8",
     "immutable": "3.8.2",
+    "is-hotkey": "0.1.4",
     "jquery": "3.4.1",
     "lodash": "4.17.14",
     "marked": "0.6.2",