Fix/unified search papercuts

[skjnldsv]

Final remnants of #22092 (comment)

• No results flashes briefly before a search
• Add loading spinners on unfinished search providers requests
• Cancel requests on search and on reset

---

Also makes aria landmarks compliant

[skjnldsv]

TypeError: n.sent.data is undefined
n UnifiedSearch.vue:469

I get this when trying to load more results of e.g. Talk messages

Thanks for the fix Joas :)

[skjnldsv]

Done @MorrisJobke @raimund-schluessler @rullzer

[skjnldsv]

/backport to stable20

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 33202: failure

mariadb10.1-php7.2

Show full log

There were 2 warnings:

1) Test\Files\ViewTest::testRenameFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

2) Test\Files\ViewTest::testCopyFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

--

There was 1 failure:

1) OCA\Files_Versions\Tests\VersioningTest::testRestoreMovedShare
File content has not changed
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'version 2'
+'version 1'

/drone/src/apps/files_versions/tests/VersioningTest.php:729

mariadb10.4-php7.3

Show full log

There were 2 warnings:

1) Test\Files\ViewTest::testRenameFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

2) Test\Files\ViewTest::testCopyFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

--

There was 1 failure:

1) Test\Share20\DefaultShareProviderTest::testDeleteUser with data set #3 (0, 'a', 'b', 'c', 'd', false)
Failed asserting that actual size 0 matches expected size 1.

/drone/src/tests/lib/Share20/DefaultShareProviderTest.php:2255

mysql5.6-php7.2

Show full log

There were 2 warnings:

1) Test\Files\ViewTest::testRenameFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

2) Test\Files\ViewTest::testCopyFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static

--

There was 1 failure:

1) OCA\Files_Sharing\Tests\ExpireSharesJobTest::testExpireLinkShare with data set #6 (true, 'P1M', false, true)
Failed asserting that actual size 1 matches expected size 0.

/drone/src/apps/files_sharing/tests/ExpireSharesJobTest.php:186

[rullzer]

Lets do this 🚀

[raimund-schluessler]

Done @MorrisJobke @raimund-schluessler @rullzer

I know, I am a bit late, but it works very nicely now! Thanks a lot @skjnldsv for taking care.