Add an option to hide title

[AntonPetrov]

Based on feedback from PomBase from @valwood and @kimrutherford, it would be useful to add an option for hiding the Secondary structure heading. Currently this can be accomplished by setting the titleSize to 0px but there should be a more official way of accomplishing this.

[carlosribas]

I'll think of an alternative, but it will most likely work the same way, for example "hideTitle": "true". I'll be in touch as soon as it's finished

[carlosribas]

Ok, this can be done using the following parameter:

customStyle='{
    "hideTitle": "true"
}'

[kimrutherford]

Thanks! I've just tested that option and it works for us.

@ValWood The change will be on pombase.org in the morning.