message: Fix React warning by moving handler to each button
  React is disturbed that the buttons don't have their own event handlers, so
  let's just move it there.
diff: @@ -470,6 +470,7 @@ export default class CreateSecretStorageDialog extends React.PureComponent {
  value={CREATE_STORAGE_OPTION_KEY}
  name="keyPassphrase"
  checked={this.state.passPhraseKeySelected === CREATE_STORAGE_OPTION_KEY}
  + onChange={this._onKeyPassphraseChange}
  outlined
  >
  <div className="mx_CreateSecretStorageDialog_optionTitle">
  @@ -488,6 +489,7 @@ export default class CreateSecretStorageDialog extends React.PureComponent {
  value={CREATE_STORAGE_OPTION_PASSPHRASE}
  name="keyPassphrase"
  checked={this.state.passPhraseKeySelected === CREATE_STORAGE_OPTION_PASSPHRASE}
  + onChange={this._onKeyPassphraseChange}
  outlined
  >
  <div className="mx_CreateSecretStorageDialog_optionTitle">
  @@ -509,7 +511,7 @@ export default class CreateSecretStorageDialog extends React.PureComponent {
  "Safeguard against losing access to encrypted messages & data by " +
  "backing up encryption keys on your server.",
  )}</p>
  - <div className="mx_CreateSecretStorageDialog_primaryContainer" role="radiogroup" onChange={this._onKeyPassphraseChange}>
  + <div className="mx_CreateSecretStorageDialog_primaryContainer" role="radiogroup">
  {optionKey}
  {optionPassphrase}
  </div>
  