Revert "pass getClickableArea into autosuggesttextarea as prop"

This reverts commit 99f0a069dd.

app/soapbox/components/autosuggest_textarea.js

@@ -51,7 +51,6 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
     onFocus: PropTypes.func,
     onBlur: PropTypes.func,
     clickableAreaRef: PropTypes.object,
-    getClickableArea: PropTypes.func.isRequired,
   };
 
   static defaultProps = {
@@ -165,9 +164,14 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
     this.textarea.focus();
   }
 
+  getClickableArea = () => {
+    const { clickableAreaRef } = this.props;
+    return clickableAreaRef ? clickableAreaRef.current : this.form;
+  }
+
   isClickInside = (e) => {
     return [
-      this.props.getClickableArea(),
+      this.getClickableArea(),
       document.querySelector('.autosuggest-textarea__textarea'),
     ].some(element => element && element.contains(e.target));
   }

app/soapbox/features/compose/components/compose_form.js

@@ -286,7 +286,6 @@ class ComposeForm extends ImmutablePureComponent {
           onSuggestionSelected={this.onSuggestionSelected}
           onPaste={onPaste}
           autoFocus={shouldAutoFocus}
-          getClickableArea={this.getClickableArea}
         >
           {
             !condensed &&