[3.5.0 Beta] Switch plugin list JHTML grid.sort to searchtools.sort

[tranduyhung]

Steps to reproduce the issue

In Joomla 3.5.0 beta

• go to plugin list in back-end
• sort the table by any column (for example sort by plugin name or by ID)
• navigate to other places in back-end
• go back to plugin list

Expected result

Plugin table should remember the previous sort and display the plugins in that ordering.

Actual result

The previous sort is not remembered.

System information (as much as possible)

Joomla 3.5.0 beta.

This pull request switches plugin list's default.php layout file from using the old JHtml::('grid.sort') to the new JHtml::('searchtools.sort'), this also fixes the problem described above.

[infograf768]

Please alpha order the new strings and delete the 2 empty lines at the top of the ini file.
Otherwise, works OK here.

[tranduyhung]

Thank you @infograf768 for letting me know the problems. I fixed in it in my branch.

[infograf768]

I have tested this item ✅ successfully on 6324cfe

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[RonakParmar]

I have tested this patch successfully in Joomla 3.5.0 beta.

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/8361.}

[zero-24]

RTC. Thanks.

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/8361.}