Fix block/mute lists showing a follow button when unblocking a user (#18364)

Fixes #601

app/javascript/mastodon/features/blocks/index.js

@@ -69,7 +69,7 @@ class Blocks extends ImmutablePureComponent {
           bindToDocument={!multiColumn}
         >
           {accountIds.map(id =>
-            <AccountContainer key={id} id={id} />,
+            <AccountContainer key={id} id={id} defaultAction='block' />,
           )}
         </ScrollableList>
       </Column>

app/javascript/mastodon/features/mutes/index.js

@@ -69,7 +69,7 @@ class Mutes extends ImmutablePureComponent {
           bindToDocument={!multiColumn}
         >
           {accountIds.map(id =>
-            <AccountContainer key={id} id={id} />,
+            <AccountContainer key={id} id={id} defaultAction='mute' />,
           )}
         </ScrollableList>
       </Column>