Wisywig widget

[sergeyglazyrindev]

We should add wisywig widget as it is exists in the old uadmin implementation.(probably TinyMCE)
Corresponding html from previous implementation:

html                 
                 <td style="width:80%;" class="search">
                    <label class="col-sm-12 control-label form_label visible-xs" data-toggle="tooltip" data-placement="bottom" title="{{ .Help }}"><span class="camelcaseFix">{{.DisplayName}}</span>{{ if eq .Help "" }}{{ else }}<span class="text-muted" style="font-size:12px;"> <i class="fa fa-question-circle"></i>{{end}}:{{ if .Required }}<span style="color:#f00;font-weight:bold;">&nbsp;*</span>{{ end }}</label>
                    <div class="col-sm-12">
                      {{if $is_readonly}}
                      <div name="{{ .Name }}">{{ .Value }}</div>
                      {{else}}
                      <textarea name="{{ .Name }}" data-html-editor>{{ .Value }}</textarea>
                      {{end}}
                      {{ if eq .Help "" }}{{ else }}<span class="text-muted" style="font-size:12px;"><i class="fa fa-question-circle"></i> {{.Help}}</span>{{ end }}
                      {{if ne "" (.ErrMsg)}}<span class="text-muted" style="font-size:12px; color:red;"><i class="fa fa-question-circle"></i> {{.ErrMsg}}</span>{{ end }}
                    </div>
                  </td>