Fix display of data-function

[chmst]

Pull Request for Issue #38958

Open: removing modal from com_sheduler.

Summary of Changes

Fix display of data-function in com_modules, remove data-function in com_scheduler
Remove modal view

Testing Instructions

Compare the html code of Select screens of com_modules and com_scheduler
Try to find a situation where a modal view is missing.

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

No data-function when $function is empty in com_modules, No data-function in com_scheduler

Remove Modal view

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• [x ] No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• [ x] No documentation changes for manual.joomla.org needed

[chmst]

Hopefully thats correct now; removed wrong indents

[Quy]

Before PR:

After PR (missing heading & button):

[chmst]

Fix toolbar, thank you @Quy

[Quy]

I have tested this item ✅ successfully on ca16170

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[viocassel]

I have tested this item ✅ successfully on e957027

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[richard67]

RTC

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[fancyFranci]

Thank you for cleaning this up!