[5.2] Compress the thumbnails

[dgrammatiko]

Pull Request for Issue #43272 .

Summary of Changes

Increase the compression rate for the generated thumbnails

Testing Instructions

Follow the issue description

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[brianteeman]

Now we have thumbnails that are fit for purpose. Thanks!!!

Using the images in this archive to test with
test.zip

Filename	Filesize kb
	Original	Before PR	After PR
image1.png	44.05	105.85	6.58
image2.png	452.83	75.3	8.41
image3.png	30.47	93.39	9.51
image4.jpg	250.94	27.79	6.6
image5.jpg	114,55	26.0	6.87
image6.jpg	260.38	34.84	8.97

[brianteeman]

I have tested this item ✅ successfully on 08c6404

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[alikon]

I have tested this item ✅ successfully on 08c6404

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43282.}

[alikon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43282.}

[HLeithner]

This pull request has been automatically rebased to 5.2-dev.

[pe7er]

Thanks @dgrammatiko !