Synchronize the library tab with typing type switcher in sequence mode

[ljubica-milovic]

Background

Currently, when the user opens macromolecules mode, the default typing type in sequence mode in RNA, but the tab in the library is Peptides.
In tis ticket, changes made to the typing type switcher (RNA/DNA/PEP) should be reflected on the library tab, but not in the other direction (changing the tab in the library does not impact the switcher).

Requirements

1. The default tab in the library should be RNA.

Because the default typing type is RNA.

2. If the user changes the typing type to PEP from RNA or DNA, the library tab should change to Peptide.

User can change typing type by clicking on the switcher, or by using hotkeys.

3. If the user changes the typing type to RNA or DNA from PEP, the library tab should change to RNA.

4. When the user changes the typing type from RNA to DNA (or the opposite), no changes in the library tab should happen.