disabled button when comment body is empty

[Ticket: #126]

While keywords are being edited, the send should be disabled

disable button as long as one or multiple edits are happening

[Ticket: #131]

fix ui for spellcheck error.

This reverts merge request !29

This reverts merge request !24

Added regex for the spacy response, added tooltips to buttons and checkboxes, cleaned es-lint errors in create-comment.component.ts and spacy-dialog.component.ts

display the correct count of input chars,
moved the grammar failure calculation to the openSpacyDialog method.

changed Styling for wrong words.

parse Language Tool API response,
mark all wrong words,
adding a button which activates grammar checking.

This reverts merge request !421