Make sure column-related methods keep things consistent

app/models/card/postponable.rb

@@ -26,10 +26,4 @@ module Card::Postponable
       end
     end
   end
-
-  def resume
-    if postponed?
-      not_now.destroy
-    end
-  end
 end

app/models/card/triageable.rb

@@ -18,10 +18,19 @@ module Card::Triageable
 
   def triage_into(column)
     raise "The column must belong to the card collection" unless collection == column.collection
-    update! column: column
+
+    transaction do
+      reopen
+      activity_spike&.destroy
+      update! column: column
+    end
   end
 
   def send_back_to_triage
-    update!(column: nil)
+    transaction do
+      reopen
+      activity_spike&.destroy
+      update!(column: nil)
+    end
   end
 end

test/models/card/postponable_test.rb

@@ -22,10 +22,6 @@ class Card::PostponableTest < ActiveSupport::TestCase
     assert_changes -> { card.reload.postponed? }, to: true do
       card.postpone
     end
-
-    assert_changes -> { card.reload.postponed? }, to: false do
-      card.resume
-    end
   end
 
   test "scopes" do