feat(lock): style notch, corners, and icon

src/styles/window/lock.css

@@ -2,27 +2,20 @@
   background-size: cover;
 }
 
-#lock-notch {
-    margin: 0 20px;
+#lockscreen-bg #panel {
+  background-color: transparent;
 }
 
-#lock-notch-stack {
-    background-color: #000000;
-    border-radius: 0 0 apply(radius-lg) apply(radius-lg);
-    min-width: 200px;
-    min-height: 34px;
-}
-
-#lock-notch-corner {
-    background-color: #000000;
-    border-radius: 0;
-    min-width: 20px;
-    min-height: 20px;
+#lockscreen-bg #panel-notch-corner {
+  background-color: @glass-surface-solid;
 }
 
 #indicator-box {
   margin-right: 10px;
-  margin-top: 4px;
+}
+
+#notch-idle-icon {
+  margin-right: 10px;
 }
 
 #indicator-box #bt-button,