Improve bad input handling in resolveLSID

[labkey-jeckels]

Rationale

java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - Error at index 0 in: "" "
	at java.base/java.net.URLDecoder.decode(URLDecoder.java:237) ~[?:?]
	at org.labkey.api.exp.Lsid.decodePart(Lsid.java:290) ~[api-25.7-SNAPSHOT.jar:?]
	at org.labkey.api.exp.Lsid$LsidBuilder.<init>(Lsid.java:372) ~[api-25.7-SNAPSHOT.jar:?]
	at org.labkey.api.exp.Lsid.canonical(Lsid.java:300) ~[api-25.7-SNAPSHOT.jar:?]
	at org.labkey.experiment.controllers.exp.ExperimentController$ResolveLSIDAction.getView(ExperimentController.java:5349) ~[experiment-25.7-SNAPSHOT.jar:?]
	at org.labkey.experiment.controllers.exp.ExperimentController$ResolveLSIDAction.getView(ExperimentController.java:5340) ~[experiment-25.7-SNAPSHOT.jar:?]
	at 

Repro: https://localhost/home/experiment-resolveLSID.view?lsid=urn%3Alsid%3Alabkey.com%3Atest%3Atest%25%22bad%3A2

Changes

• Catch the exception and show useful error
• Use DOM builder for trivial UI
• Minor auto-refactor code cleanup