[Platform]: Display long variant ID appropriately in variant page header

[gjmcn]

Description

For hashed ID, show shortened ID - when click on it, show both the hashed ID and the full ID.

If the ID is not hashed but still too long to show in the header, show shortened ID - when click it, show full ID.

Since full variant ID can be very long, implementation relies on a click event and a dialogue component (rather than a hover event and a popover).

Issue: #3390

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Checked on dev. Example variant IDs (from short to long):

• 19_10112623_C_T
• OTVAR_12_54283979_209e9d0553810834370f743a4f1f554d
• OTVAR_2_189001286_75a16febfb01d76c72337aa605d02e34

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have made corresponding changes to the documentation