Change share dialog button style (#5812)

* change share button size

* change submit button loading style

frontend/src/components/dialog/custom-permission/custom-permission-editor.js

@@ -126,7 +126,7 @@ class CustomPermissionEditor extends React.Component {
             <span>{title}</span>
           </div>
           <div className="operation">
-            <button type="button" className="btn btn-outline-primary" onClick={this.onUpdateCustomPermission}>{gettext('Submit')}</button>
+            <button type="button" className="btn btn-sm btn-outline-primary" onClick={this.onUpdateCustomPermission}>{gettext('Submit')}</button>
           </div>
         </div>
         <div className="permission-main mt-4">

frontend/src/components/dialog/custom-permission/list-custom-permissions.js

@@ -20,7 +20,7 @@ class ListCustomPermissions extends React.Component {
         <div className="permission-header">
           <div className="title">{gettext('Permission')}</div>
           <div className="operation">
-            <button type="button" className="btn btn-outline-primary" onClick={this.props.onAddCustomPermission}>{gettext('Add permission')}</button>
+            <button type="button" className="btn btn-sm btn-outline-primary" onClick={this.props.onAddCustomPermission}>{gettext('Add permission')}</button>
           </div>
         </div>
         <div className="permission-main mt-4">

frontend/src/components/dialog/share-to-invite-people.js

@@ -297,7 +297,7 @@ class ShareToInvitePeople extends React.Component {
                 />
               </td>
               <td>
-                <Button onClick={this.shareAndInvite} disabled={isSubmitting}
+                <Button onClick={this.shareAndInvite} className="submit-btn" disabled={isSubmitting}
                 >{isSubmitting ? <Loading /> : gettext('Submit')}</Button>
               </td>
             </tr>