Bug: Disallow user to check NCA / Outputs tabs without mapping data

[js3110]

Issue

Closes #143

Description

When user has not mapped the data (define column names and accepted) it should not be able to go through other tabs (NCA or Outputs) as it can be confusing for them to see errror messages afterwards. Instead, those tabs should remain disable and perhpaps even show a notification

Definition of Done

• User cannot use other tabs until data is mapped
• Once data is mapped, other tabs are enables

[m-kolomanski]

Looks good to me, thank you! I have added two nitpicks/suggestions to consider, but the change is fine as is.

[m-kolomanski]

nitpick: Since every other element (title, module name, module id) refers to this tab as tlg and not tlgs, I would keep that consistent and give it the same value.

[m-kolomanski]

suggestion: In repetitive calls like this you can utilize some functional programming with purrr:

Suggested change

	shinyjs::enable(selector = "#page li a[data-value=nca]")
	shinyjs::enable(selector = "#page li a[data-value=visualisation]")
	shinyjs::enable(selector = "#page li a[data-value=tlgs]")
	purrr::walk(c("nca", "visualisation", "tlgs"), \(tab) {
	shinyjs::disable(selector = paste0("#page li a[data-value=", tab, "]"))
	})

but in this case, considering not much code repetition, it is absolutely fine.

[Gero1999]

Hey good job! I think this solution is clean and simple 👌🏽

In terms of feature I will also add a nitpick request! Could you also include a message in Review Data that until the dataframe is uploaded says something like: "Please, remember to submit your variables mapping in Mapping and Filters"