remove old cleanup code and fix button disable

app/components/elements/MediumEditor.jsx

@@ -330,7 +330,7 @@ class MediumEditor extends React.Component {
                         </div>
                         <div className={vframe_section_shrink_class}>
                             {!loading &&
-                                <button type="submit" className="button" disabled={submitting}
+                                <button type="submit" className="button" disabled={submitting || !valid}
                                     tabIndex={4}>{isEdit ? 'Update Post' : postLabel}</button>
                             }
                             {loading && <span><br /><LoadingIndicator type="circle" /></span>}

app/components/elements/ReactMediumEditor.jsx

@@ -82,9 +82,6 @@ class ReactMediumEditor extends React.Component {
                     const editor = this.medium
                     const allContents = editor.serialize() // mediumInsert plugin
                     let elContent = allContents["element-0"].value
-                    // https://github.com/orthes/medium-editor-insert-plugin/issues/341
-                    elContent = elContent.replace('<div class="medium-insert-images-progress"></div>', '')
-                    elContent = elContent.replace(' class="medium-insert-images medium-insert-active"', '')
                     return elContent
                 })
             }
@@ -134,4 +131,4 @@ export default connect(
             });
         },
     })
-)(ReactMediumEditor)
+)(ReactMediumEditor)
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