sequencing

We need some good graphics for the main sampler screen. This is where you can do rudimentary editing of the samples that are played in the sequencer.
There are two screens. The main screen with the controls:

• Volume (this one may be changed later)
• Speed (Playspeed. The sample also pitches up or down)
• Filter (in the middle the sound is unchanged, away from center it engages either hi-pass

We should enable a slightly-modified table output format that is gff or bed-like and can thus be more easily read into IGV

We might want to give users a hint that Nextclade requires a lot of memory in case there are many sequences.

We can simply take fasta files size and upon some threshold to show a reactstrap alert informing users about that fact and recommend them splitting their datasets in multiple chunks as well as common memory-freeing steps.

It is essential to explain that all computation is happening o