NNS1-3435: Reuse ConfirmationModal styles through other consumers of ConfirmationModal

[yhabib]

Motivation

There is a common ConfirmationModal component that should be reused for many different flows.

Changes

• Removes custom css by consumers of ConfirmationModal and reuses exported css from the confirmation-modal styles.

Tests

Testable under https://qsgjb-riaaa-aaaaa-aaaga-cai.yhabib-ingress.devenv.dfinity.network/

VoteConfirmationModal

Before:

After:

DissolveActionButtonModal

Before:

Title alignment will be fixed generally after this MR.

After:

ImportTokenRemoveConfirmation:

Before:

After:

HardwareWalletNeuronAddHotkeyModal

Before:

After:

Todos

• Add entry to changelog (if necessary)
  Not necessary.

[mstrasinskis]

LGTM, thanks!

[dskloetd]

How come in the screenshot you posted of "Confirm Addition of Hotkey" the last sentence is still centered?