[HAWNG-485] Show some feedback at login screen if preemptive auth failed

[grgrzybek]

No description provided.

[github-actions]

Test Results

  8 files  ± 0    8 suites  ±0   41m 46s ⏱️ + 4m 58s
 66 tests ± 0   64 ✅ ± 0   2 💤 ±0  0 ❌ ±0 
536 runs  +66  508 ✅ +62  28 💤 +4  0 ❌ ±0 

Results for commit 0efa2bc. ± Comparison against base commit db76323.

♻️ This comment has been updated with latest results.

[hawtio-ci]

Test results

Run attempt: 2031
Detailed summary

NAME	TESTS	PASSED ✅	SKIPPED 💤	FAILED ❌	ERRORS 🚫	TIME 🕖
results-quarkus-node(18)-java(17)-firefox	67	64	3	0	0	309.543
results-quarkus-node(18)-java(21)-firefox	67	64	3	0	0	310.78
results-quarkus-node(20)-java(17)-firefox	67	64	3	0	0	312.713
results-quarkus-node(20)-java(21)-firefox	67	64	3	0	0	319.099
results-springboot-node(18)-java(17)-firefox	67	63	4	0	0	310.331
results-springboot-node(18)-java(21)-firefox	67	63	4	0	0	312.857
results-springboot-node(20)-java(17)-firefox	67	63	4	0	0	312.951
results-springboot-node(20)-java(21)-firefox	67	63	4	0	0	318.382