* command server starts for one repository in the project, but  executes commands for any repository with -R argument;
* if progress indicator cancelled command server stopped immediately and a new one started again;
* start and stop server calls need to be changed according to project setting: may be using message bus and do not performed from HgCommandExecutor;
* error  & crash handlers need to be added;

IDEA-118400 Update Project dialog  redesigned, IDEA-106435 ability to perform only update, IDEA-75768 checks saved for Update dialog

 * Update Project dialog redesigned considering most common use cases of Mercurial users;
 * ability to update without merge added (IDEA-106435);
 * update project options remembered;
 * update settings moved to a separate class;
 * updateType enums used instead of boolean flags

 - use sudden lookup element only if show.live.template.in.completion is
 disabled
 - restart completion on every template key

Reimplement calculation of emmet abbreviation.
See original implementation: https://github.com/emmetio/emmet/blob/master/lib/utils/action.js

suggest to restart IDEA if user accepted to enable/disable plugins from startup notification (IDEA-121369)

registering output-to-buildTarget mapping instead of output-to-source mapping to address cases when multiple sources compile into the same output (e.g. Kotlin)

fix problem with extending sorted set by one and attempting to increase random access capacity in case of value removal

Marking DuplicateIndex as PsiDependentIndex to attempt to avoid problems with unsaved document indexing being asynchronously committed (EA-36001)

get rid of RowSorters to fix a few exceptions. New Plugin UI has its own table header without swing's row sorters