Feature/fix tabulator stops (#1831)

Add tab stops to action to increase accessibility of SCM-Manager with keyboard only usage. Also add a focus trap for modals to ensure the actions inside the modal can be used without losing the focus.

Co-authored-by: René Pfeuffer <rene.pfeuffer@cloudogu.com>

scm-ui/ui-components/src/index.ts

@@ -85,6 +85,7 @@ export { regExpPattern as changesetShortLinkRegex } from "./markdown/remarkChang
 export * from "./markdown/PluginApi";
 export * from "./devices";
 export { default as copyToClipboard } from "./CopyToClipboard";
+export { createA11yId } from "./createA11yId";
 
 export { default as comparators } from "./comparators";