Adjust 2FA step 2 behaviour to move QR code into a modal #7024

Job	Run time
Client	1m 5s
Javascript	3m 25s
UI (0)	34m 26s
PHP (UnitTests, 7.2, Mysql, PDO_MYSQL)	2m 38s
UI (1)	15m 31s
PHP (UnitTests, 8.2, Mariadb, PDO_MYSQL)	2m 53s
UI (2)	17m 6s
PHP (UnitTests, 8.4, Mysql, MYSQLI)	2m 42s
UI (3)	13m 58s
PHP (SystemTestsPlugins, 7.2, Mysql, PDO_MYSQL)	13m 26s
PHP (SystemTestsPlugins, 8.2, Mariadb, PDO_MYSQL)	11m 57s
PHP (SystemTestsPlugins, 8.4, Mysql, MYSQLI)	14m 47s
PHP (SystemTestsCore, 7.2, Mysql, PDO_MYSQL)	9m 5s
PHP (SystemTestsCore, 8.2, Mariadb, PDO_MYSQL)	8m 3s
PHP (SystemTestsCore, 8.4, Mysql, MYSQLI)	9m 6s
PHP (IntegrationTestsCore, 7.2, Mysql, PDO_MYSQL)	10m 49s
PHP (IntegrationTestsCore, 8.2, Mariadb, PDO_MYSQL)	12m 39s
PHP (IntegrationTestsCore, 8.4, Mysql, MYSQLI)	14m 48s
PHP (IntegrationTestsPlugins, 7.2, Mysql, PDO_MYSQL)	30m 30s
PHP (IntegrationTestsPlugins, 8.2, Mariadb, PDO_MYSQL)	28m 13s
PHP (IntegrationTestsPlugins, 8.4, Mysql, MYSQLI)	38m 43s
	4h 55m 50s

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