SearchKit - Don't save on enter key

[colemanw]

Overview

In search kit, don't try to save when the user presses enter.

Before

Search saves when user presses enter.

After

Nothing happens when user presses enter.

Technical Details

Browsers automatically click the first <button type="submit"> they find when the user presses enter in a text field. So the fix was to make sure all buttons are type "button"

[civibot]

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[colemanw]

@eileenmcnaughton doing search-on-enter caused problems with validation. This is at least better though.

[eileenmcnaughton]

test this please

[colemanw]

@eileenmcnaughton I'll interpret that as approval cause I need this merged to prevent conflicts with my WIP :)
(and even if you wanted something different, this PR is simply fixing bad markup so it's still necessary)

[eileenmcnaughton]

OK cool