get_summ_subset: Close stale FIXME issues after so many changes.

app_config_and_status: Scale down from TODO/FIXME to TODO.

mk_comp_tab: Remove worked around FIXME.

make_eic_ms1_plot: Removed FIXME related to ms1_rt. This needs a proper rework, but does not have much impact at the moment.

rf_get_cindex: Removed FIXME which seems to not trigger any weird behaviour yet.

output$comp_table: Scale down from TODO/FIXME to TODO for plotting the compound list.

... and others ...

* shiny-ui-base(gen_cindex, gen_summ_subset): Adapted. Function
`gen_cindex' now returns less confusing output.

* plotting(get_data_from_key): Argument `outcols' now has a default
NULL value.

Cleaned some more erroneous MS2 spectra (for precid) by removing intensity NAs from cgram_ms1 when using cgram_ms1 for preserving fine results.

functions which select and define colour palette based on data.

ms1_rt is not calculated well over groups in `summ_rows'.

But, there is disparity between RT labels and amount of visible
curves. Also, reestablish zooming and double-clicking. Though,
first thing to be done is to re-enable MS2 EIC.