Improve naming and linter checks in the new UI codebase

**Environment**
* I followed [the tutorial for setting up a dev environment](https://grr-doc.readthedocs.io/en/latest/developing-grr/setting-up-dev-env.html).
* I'm developing in VScode, with the `ms-vscode.vscode-typescript-tslint-plugin` plugin installed, version `v1.2.2`
* The issue is with the new UI codebase: [`grr/server/grr_response_server/gui`](https://github.com/google/grr/tree/master/grr/server/grr_response_server/gui/ui). I haven't explored the rest of the code.

**Describe the issue**
There are a few tslint warnings that show up consistently across components. The ones that I've noticed are:
* Some [component selectors](https://github.com/google/grr/blob/master/grr/server/grr_response_server/gui/ui/components/flow_details/helpers/file_results_table.ts#L48) do not have a special prefix (e.g. to make them distinct from 3rd-party components). I get the following warning: `The selector should be prefixed by "app" (https://angular.io/guide/styleguide#style-02-07) (component-selector)tslint(1)`. If the component doesn't have dashes in the name like the [timestamp component](https://github.com/google/grr/blob/master/grr/server/grr_response_server/gui/ui/components/timestamp/timestamp.ts#L7) the exact error is: `The selector should be kebab-cased and include a dash (https://angular.io/guide/styleguide#style-05-02) (component-selector)tslint(1)`
* Some [component classes](https://github.com/google/grr/blob/master/grr/server/grr_response_server/gui/ui/components/client_details/client_details.ts#L13) don't have a `Component` suffix, which gives the following warning: `The name of the class ClientDetails should end with the suffix Component (https://angular.io/styleguide#style-02-03) (component-class-suffix)tslint(1)`

This is not a complete list, and there are probably more tslint warnings.

Shouldn't those warnings be checked in the CI?