fix: Disable help for disabled plugins

[mmuzikar]

Dev build connected to quarkus looks like this:

with "disabledRoutes": ["/disabled", "/camel", "/quartz"]:

[github-actions]

Test Results

  8 files  ±  0    8 suites  ±0   42m 13s ⏱️ + 15m 48s
 66 tests ±  0   64 ✅ ±  0   2 💤 ± 0  0 ❌ ±0 
536 runs  +198  508 ✅ +187  28 💤 +11  0 ❌ ±0 

Results for commit ac8ad3e. ± Comparison against base commit bdc7f40.

[hawtio-ci]

Test results

Run attempt: 2215
Detailed summary

NAME	TESTS	PASSED ✅	SKIPPED 💤	FAILED ❌	ERRORS 🚫	TIME 🕖
results-quarkus-node(18)-java(17)-firefox	67	64	3	0	0	321.963
results-quarkus-node(18)-java(21)-firefox	67	64	3	0	0	324.678
results-quarkus-node(20)-java(17)-firefox	67	64	3	0	0	319.975
results-quarkus-node(20)-java(21)-firefox	67	64	3	0	0	311.79
results-springboot-node(18)-java(17)-firefox	67	63	4	0	0	309.681
results-springboot-node(18)-java(21)-firefox	67	63	4	0	0	319.02
results-springboot-node(20)-java(17)-firefox	67	63	4	0	0	313.786
results-springboot-node(20)-java(21)-firefox	67	63	4	0	0	312.222

[tadayosi]

awesome