Remove gallery icon from fictious record set

[CarolineDenis]

Fixes #4211

[maxpatiiuk]

I am ok with this solution if @grantfitzsimmons is ok

[pashiav]

Instructions for testers? @CarolineDenis

[CarolineDenis]

@pashiav

• go to Data Entry
• verify that the gallery icon is not present in the header
• save the form and add a new one
• save the second one
• verify the record set icon is now present but not the gallery icon
• click on record set icon to create a record set
• verify that now the gallery icon is present
• open any record set and verify gallery icon is present
• NOTES: gallery icon is disabled if there is no attachments

[bronwyncombs]

Gallery icon is not shown on data entry form headers or fictitious record set headers.

In a record set, gallery icon is now shown:

You get this dialog if no attachments are added upon clicking the icon:

I know that disabling the icon in this case was discussed. I don't have a preference one way or the other really but am requesting review from @grantfitzsimmons to follow up

[emenslin]

Galley icon does not show up unless it is an actual record set. Even if there are no attachments the gallery icon is there, as Bronwyn said, I don't care if it is there or not, but it depends on what Grant thinks.