Search: Template failing

[David Sutton]

As a result of these changes to the search template: https://bitbucket.org/ausocean/vidgrind/pull-requests/373

Vidgrind now crashes when trying to make a search, returning this log:

2023/12/20 21:51:25 ExecuteTemplate failed on search.html: template: search.html:230:85: executing "search.html" at <$.Subtype>: can't evaluate field Subtype in type *main.searchData

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[Alan Noble]

The subytype function is now implemeted using:{{part (split .Type "/") 1}}

[David Sutton]

Resolved in https://bitbucket.org/ausocean/vidgrind/pull-requests/388