adjust delete/archive/restore text color

static/style.css

@@ -800,6 +800,7 @@
     text-overflow:ellipsis;
     white-space:nowrap;
     text-align:center;
+    color:var(--muted);
     font-size:10px;
     font-weight:600;
     line-height:1;

tests/test_session_touch_actions.py

@@ -185,6 +185,7 @@ def test_session_swipe_actions_use_circular_icon_badges():
     assert "min-width:58px" in label
     assert "width:100%" in label
     assert "text-align:center" in label
+    assert "color:var(--muted)" in label
     assert "font-size:10px" in label
     assert "transform:scale(var(--session-swipe-label-scale,1))" in label
     assert "transform-origin:top center" in label