Issue list with Check status button

[kjnanda]

• 1. Check status button should be visible if the relevant setting is kept enable from settings.

It should be reflected at below places regardless of any active BuddyPress template.

1. On the activity page
2. When the media is posted as the BuddyPress comment
3. When the media is posted as a comment from a lightbox.

As per the current scenario, the Check Status button is only visible in case only when the Buddypress Nouveau template is active and the only on the activity page.

Please fix it for point 2 and 3 mentioned above.

Please check this visual for more information - https://drive.google.com/file/d/1qAHqZ5JBwlrPwQXcSHrbhsNF_MV0gFOo/view

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• 2. Throws PHP errors in AJAx response while clicking on check status button from upload.php page.

Steps:

1. Upload audio/video media file anywhere in your site
2. upload.php page would show up the Check Status button in the dashobard
3. Click on Check status button trigger the errors in the console while transcoding is in progress
4. Once the file is transcoded the errors will be gone.

Please refer this error log file.
krupa-transcoder.dev2.rt.gw-1561380051631.log

Test Environment 

1. Wordpress 5.2.1
2. Bussypress 4.3.0 - Legacy template
3. rtMedia 4.5.6
4. Theme - all wordpress default theme 

[dharmin]

Following PR on rtMedia core should solve the subtask 1:
https://github.com/rtMediaWP/rtMedia/pull/1390/files