Fix Agroal Dev UI table switching and move SQL input to the top

[mbladel]

Fixes #46761.

I noticed that if we set the current dataset to null while waiting for the executeSQL RPC call, triggering rendering of the Fetching data... progress bar while the query executes instead of the table (which is also nice for long-running queries), then the columns are refreshed correctly. I'm guessing this happens because the previous table is removed from the interface before displaying the updated results.

I also took the liberty of moving the SQL input to the top of the data grid, as suggested by @phillip-kruger here, and I've also aligned the buttons for clearing / executing current SQL to look the same as #46728. LMK what you think.

[phillip-kruger]

LGTM. Thanks !

[phillip-kruger]

The 4 buttons in the top right looks a bit funny. We can maybe later think how the layout can change there.

[quarkus-bot]

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It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

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Flaky tests - Develocity

⚙️ JVM Tests - JDK 17

📦 extensions/hibernate-orm/deployment

✖ io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest.testFieldAccess - History

• Expecting actual not to be null - java.lang.AssertionError

java.lang.AssertionError: 

Expecting actual not to be null
	at io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest$FieldAccessEnhancedDelegate$1.assertValue(PublicFieldAccessInheritanceTest.java:141)
	at io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest.doTestFieldAccess(PublicFieldAccessInheritanceTest.java:100)
	at io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest.testFieldAccess(PublicFieldAccessInheritanceTest.java:61)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at io.quarkus.test.QuarkusUnitTest.runExtensionMethod(QuarkusUnitTest.java:521)

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⚙️ JVM Tests - JDK 17 Windows

📦 extensions/hibernate-orm/deployment

✖ io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest.testFieldAccess - History

• Expecting actual not to be null - java.lang.AssertionError

java.lang.AssertionError: 

Expecting actual not to be null
	at io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest$FieldAccessEnhancedDelegate$1.assertValue(PublicFieldAccessInheritanceTest.java:141)
	at io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest.doTestFieldAccess(PublicFieldAccessInheritanceTest.java:100)
	at io.quarkus.hibernate.orm.applicationfieldaccess.PublicFieldAccessInheritanceTest.testFieldAccess(PublicFieldAccessInheritanceTest.java:61)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at io.quarkus.test.QuarkusUnitTest.runExtensionMethod(QuarkusUnitTest.java:521)