No missing rewards banners for non-votable neurons

[mstrasinskis]

Motivation

In today's implementation, you can have neurons that are unlocked but have been inactive for so long that the "confirm following" warning appears. This is undesired, so the followee confirmation warning shouldn't be shown if the neuron cannot vote.

This PR ensures that neurons without enough dissolve delay to vote are filtered out from the derived store. This logic is automatically applied to the related banners and page indicators (red dot).

Changes

• Filter out non-votable neurons from the missing rewards store.
• Make banner on neuron details rely on the store to avoid code duplication (changes).

Tests

• Add dissolveDelaySeconds to addNeuronWith fake api.
• Updated.
• Tested locally to ensure that banners and indicators are not shown for non-votable && inactive neurons.

Todos

• Add entry to changelog (if necessary).