Macro: Insertion mode for nucleotide entry (switch RNA/DNA)

[olganaz]

Background
Since in sequence format RNA and DNA nucleotides are designated by the same symbols {A, T, C, G, U} , so it is necessary to specify how to interpret these symbols in Ketcher.
Nucleotide = RNA preset added on canvas (sugar+phosphate+base)

Requirements

In addition to the rules for addition of new nucleotides to canvas in sequence mode [#3650] user should be able to specify the type of entered sequence.

1. Toolbar:

• When text-editing mode is ON in sequence mode, additional dropdown menu should be displayed in toolbar (RNA/DNA/Peptide)
• Before entering a sequence on canvas, user should be able to choose the type of the sequence (RNA/DNA).
• By default RNA option should be selected for the first selection. While in macro mode last selected value is retained.

2. Nucleotide Entry:

• Selecting one of the options RNA/DNA defines the sugar in newly added nucleotides from keyboard (For RNA - ribose, for DNA - deoxyribose) and shouldn't change the sugar monomer in existing on canvas nucleotides.
• Symbols displaying DNA nucleotides on canvas should be marked according to mockups.
• If user changes the option (DNA/RNA) during input only the type of newly entered nucleotides should be changed.

Alternatives
"Peptide" option in toolbar is inactive currently.

UX

[Zhirnoff]

Tests added to the automation table.

[Zhirnoff]

Tested. No comments.