CusisStyle: sync with DefaultStyle

There were some changes to DefaultStyle (such as styling new
WelcomeScreen or SideBar) which weren't part of CusisStyle yet.
According lines were copied and pasted from DefaultStyle. Probably
colors need some tuning.

data/themes/cusis/style.css

@@ -52,6 +52,28 @@ automationEditor {
 	background-color: rgb(0, 0, 0);
 }
 
+#WelcomeFrame {
+	border: 2px solid rgb(32,32,32);
+	border-radius: 8px;
+	padding:2px;
+}
+
+#TitleSeparator {
+	border: 1px solid qlineargradient(x1:0, y1:0, x2:1, y2:0,
+                                       stop:0 #ccc, stop: 0.5 #444,
+                                       stop:1 #ccc);
+	border-width: 1px 0px 0px 0px;
+}
+#WelcomeFrame, #WelcomeFrame * {
+	background-color: rgb(232,232,232);
+	color: black;
+}
+
+#WelcomeFrame QLabel {
+	color: rgb(128, 128, 128);
+}
+
+
 QMenu {
 	border:1px solid black;
 	background-color: rgb( 192, 192, 192 );
@@ -138,6 +160,13 @@ QToolBar {
 	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop: 0 #4a4a4a, stop: 1.0 #383838);
 }
 
+SideBar {
+	background: qlineargradient(x1:0, y1:0, x2:1, y2:0, stop: 0 #66728c, stop: 1.0 #38404e);
+}
+
+SideBar QToolButton {
+	font-size: 12px;
+}
 
 FxMixerView QPushButton, EffectRackView QPushButton, ControllerRackView QPushButton {
 	font-size: 10px;