Fixed disconnect when selecting new SSPs and output variables

Selecting a new output variable now draws the chosen SSP from the R6 class rather than the shiny input, ensuring that it uses the SSPs that were selected at the time "Load Graphs" was last clicked (or when app was opened). The app will no longer disconnect when those selections are done in certain orders.

inst/shinyApp/components/modules/mod_run.R

@@ -148,7 +148,7 @@ run_server <- function(id, r6) {
             r6$selected_var <- reactive({input$variable})
             runs <- list()
 
-            for(i in 1:length(input$ssp_path)) {
+            for(i in 1:length(r6$ini_file)) {
                 runs[[i]] <- fetchvars(r6$core[[i]], r6$time()[1]:r6$time()[2], vars = list(r6$selected_var())) %>%
                     mutate(Scenario = names(which(scenarios == input$ssp_path[i], arr.ind = FALSE)))
             }