update txt saving mechanism to mobile client

frontend/src/components/file-view/file-toolbar.js

@@ -142,8 +142,29 @@ class FileToolbar extends React.Component {
         </ButtonGroup>
 
         <Dropdown isOpen={this.state.dropdownOpen} toggle={this.toggle} className="d-block d-md-none">
-          <DropdownToggle className="sf2-icon-more">
+          <ButtonGroup>
-          </DropdownToggle>
+            {(canEditFile && !err) &&
+                ( this.props.isSaving ?
+                  <button type={'button'} className={'btn btn-icon btn-secondary btn-active'}>
+                    <i className={'fa fa-spin fa-spinner'}/></button> :
+                  (
+                    this.props.isContentChangedButNotSaved ?
+                      <IconButton
+                        text={gettext('Save')}
+                        id={'saveButton'}
+                        icon={'fa fa-save'}
+                        // button imported in this file does not have functionalities of
+                        // isActive as button imported in markdowneditor has
+                        //isActive={!isContentChanged}
+                        onClick={this.props.onSaveChangedContent}
+                      /> :
+                      <button type={'button'} className={'btn btn-icon btn-secondary btn-active'} disabled>
+                        <i className={'fa fa-save'}/></button>
+                  )
+                )}
+            <DropdownToggle className="sf2-icon-more">
+            </DropdownToggle>
+          </ButtonGroup>
           <DropdownMenu right={true}>
             <DropdownItem>
               <a href={`${siteRoot}library/${repoID}/${Utils.encodePath(repoName + parentDir)}`} className="text-inherit">
@@ -167,13 +188,6 @@ class FileToolbar extends React.Component {
                 </a>
               </DropdownItem>
             )}
-            {(canEditFile && !err) && (
-              <DropdownItem>
-                <a href={`${siteRoot}repo/${repoID}/file/edit/?p=${encodeURIComponent(filePath)}&file_enc=${encodeURIComponent(fileEnc)}`} className="text-inherit">
-                  {gettext('Edit')}
-                </a>
-              </DropdownItem>
-            )}
             {canDownloadFile && (
               <DropdownItem>
                 <a href="?dl=1" className="text-inherit">

frontend/src/view-file-text.js

@@ -71,7 +71,7 @@ class ViewFileText extends React.Component {
           this.state.content
         ).then(() => {
           toaster.success(gettext('Successfully saved'), {
-            duration: 3
+            duration: 2
           });
           this.setState({
             isSaving: false,