feat: Made write a feedback optional

[ranjsa]

Fixes #2355

Changes:

• Removed showing of error message when text field was left empty during submitting feedback by just giving rate .

• Changed the string write a feedback to Submit Feedback in content_event.xml file

Screenshots for the change:

[iamareebjamal]

Name should be displayed with feedback

[ranjsa]

@iamareebjamal @liveHarshit I need a littele help ,
I want to add name of the user who has submitted feedback , how can i do that as we are getting only comment and rating from the server in this json response . Or should I include name from the server side.

{
  "meta": {
    "count": 1
  },
  "data": [
    {
      "relationships": {
        "event": {
          "links": {
            "self": "/v1/feedbacks/1/relationships/event",
            "related": "/v1/feedbacks/1/event"
          }
        },
        "user": {
          "links": {
            "self": "/v1/feedbacks/1/relationships/user",
            "related": "/v1/feedbacks/1/user"
          }
        }
      },
      "attributes": {
        "rating": "4",
        "deleted-at": null,
        "comment": "Awesome event"
      },
      "type": "feedback",
      "id": 1,
      "links": {
        "self": "/v1/feedbacks/1"
      }
    }
  ],
  "jsonapi": {
    "version": "1.0"
  },
  "links": {
    "self": "/v1/events/1/feedbacks"
  }
}

[iamareebjamal]

Include name from server

[ranjsa]

Include name from server

@iamareebjamal I have created a issue on the server side regarding this and i am working on it ,
can we right now close this issue #2355 with this pull request as it is solving the issue of removing error message and making comment optional , later when i will finsh working on adding name on the server side then i will create a different pull request for that .

[iamareebjamal]

close it

[ranjsa]

@iamareebjamal
Sir , actually I was talking about merging this PR so then the issue will close automatically .

[iamareebjamal]

Once, the name is shown with review, we'll merge it. No use of merging half a feature