Newsfeeds - move Filters from left to [Search Tools]

[pe7er]

This PR moves the Filter options of the Newsfeeds to the [Search Tools] button.
Note: The ordering dropdown in [Search Tools] needs to be fixed before merging.
(See Issue #6941 regarding the inconsistency with Filter options).

Test instructions

In back-end > Components > Newsfeeds
See the filters on the left

Compare with the filters in Category Manager for Newsfeeds:
In back-end > Components > Newsfeeds > Categories

This PR changes moves the Filters

from the left to the middle column and will be visible when you click on the [Search Tools] button.

Notes:

I can use some help & suggestions regarding the following issues:

• The ordering dropdown in [Search Tools] is currently not working
• The /administrator/components/com_newsfeeds/views/newsfeeds/tmpl/default.php might have old obsolete code in it
• The /administrator/components/com_newsfeeds/views/newsfeeds/view.html.php still has protected function getSortFields() which might be obsolete because the order options are now specified in /administrator/components/com_newsfeeds/models/forms/filter_newsfeeds.xml

[brianteeman]

After applying the patch the filters do move - great
BUT
After applying a filter they are hidden again - if you look at article manager they are still open

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[brianteeman]

Also as Tag information is NOT visible in the list view it seems strange to me for their to be a filter

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[pe7er]

Thanks for testing! I've to check the issue with the [Search Tools] closing after filtering.

I agree with removing the "Tag" filter as it's not displayed in any of the columns.

[coolwebcreations]

Works fine
BUT
the filters are hidden after applying

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[pe7er]

Thanks for testing. I corrected the problem with the closing Search Tools for Category + Tags filter.
Now the [Search Tools] should remain opened when any of the filters has been selected.

[brianteeman]

Retested and all good now

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[brianteeman]

Setting RTC now - thanks

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[mbabker]

Merged to 3.5-dev via c8b9875