Let page.load proceed when zoomed out, disabling submit

Note that addNoteButton.hasClass("active") check in page.load is useless because page.unload removes this class.

test/system/create_note_test.rb

@@ -15,6 +15,60 @@ class CreateNoteTest < ApplicationSystemTestCase
     end
   end
 
+  test "cannot create new note when zoomed out" do
+    visit new_note_path(:anchor => "map=12/0/0")
+
+    within_sidebar do
+      assert_no_content "Zoom in to add a note"
+      assert_button "Add Note", :disabled => true
+
+      fill_in "text", :with => "Some newly added note description"
+
+      assert_no_content "Zoom in to add a note"
+      assert_button "Add Note", :disabled => false
+    end
+
+    find(".control-button.zoomout").click
+
+    within_sidebar do
+      assert_content "Zoom in to add a note"
+      assert_button "Add Note", :disabled => true
+    end
+
+    find(".control-button.zoomin").click
+
+    within_sidebar do
+      assert_no_content "Zoom in to add a note"
+      assert_button "Add Note", :disabled => false
+
+      click_on "Add Note"
+
+      assert_content "Unresolved note ##{Note.last.id}"
+      assert_content "Some newly added note description"
+    end
+  end
+
+  test "can open new note page when zoomed out" do
+    visit new_note_path(:anchor => "map=11/0/0")
+
+    within_sidebar do
+      assert_content "Zoom in to add a note"
+      assert_button "Add Note", :disabled => true
+
+      fill_in "text", :with => "Some newly added note description"
+
+      assert_content "Zoom in to add a note"
+      assert_button "Add Note", :disabled => true
+    end
+
+    find(".control-button.zoomin").click
+
+    within_sidebar do
+      assert_no_content "Zoom in to add a note"
+      assert_button "Add Note", :disabled => false
+    end
+  end
+
   test "cannot create note when api is readonly" do
     with_settings(:status => "api_readonly") do
       visit new_note_path(:anchor => "map=18/0/0")