Consistent naming ID for `type_download_ui` for `table_with_settings` and `plot_with_settings`

[m7pr]

Feature description

Currently we have 2 similar widgets: table_with_settings and plot_with_settings. Both of them have similar structure of UI and share the same naming convention of namespaces, besides one place in type_download_ui

teal.widgets/R/plot_with_settings.R

Line 554 in 3176ff5

inputId = ns("downl"),

teal.widgets/R/table_with_settings.R

Line 139 in 3176ff5

inputId = ns("dwnl"),

Such discrepancy was caught during automated tests in #240