Proposal: add ThemePlugin function to access multilingual theme options

[NateWr]

Describe the problem
It's cumbersome to access a multilingual theme option in a template. We have to assign it to a variable and then use the locale key to access it.

{assign var="titles" value=$activeTheme->getOption('title')}
{if $titles.$currentLocale}
  {$titles.$currentLocale}
{/if}

Describe the solution
Add a ThemePlugin helper function get a localized option value.

{if $activeTheme->getLocalizedOption('title')}
  {$activeTheme->getLocalizedOption('title')
{/if}

What application are you using?
I'm proposing to add this to OJS 3.3.

Additional information
I appreciate this is a very minor improvement. But it would align ThemePlugin::getOption() with similar data access objects. Not everyone knows that $currentLocale is available in templates.

[NateWr]

Happy to forward port this if you like. But I can work around it if you don't want to add things like this to the LTS.

PRs:
#10617 (stable-3_3_0)

Tests:
pkp/ojs#4524 (stable-3_3_0)

[asmecher]

@Godoy0722, I think you've run in to a need for this, if I remember right? Could you have a look?