Restyle to banana theme

src/main/resources/styling/app.css

@@ -13,6 +13,8 @@
   -main-blue-color:    #66d9ef;
   -main-magenta-color: #ae81ff;
   -main-cyan-color:    #a1efe4;
+
+  -banana-focus-color: #fffb00;
 }
 
 .root {
@@ -73,8 +75,17 @@
   -fx-text-fill: -main-fg-color;
 }
 
+.menu > * > .arrow {
+  -fx-background-color: -main-fg-color;
+}
+
 .menu-item:focused {
-  -fx-background-color: -main-blue-color;
+  -fx-background-color: -banana-focus-color;
+  -fx-text-fill: -dark-bg-color;
+}
+
+.menu-item:focused .label {
+  -fx-text-fill: -dark-bg-color;
 }
 
 /* Menuitems visible in top of window */
@@ -157,12 +168,21 @@
 }
 
 .tree-view:focused .tree-cell:focused {
-  -fx-background-color: -main-blue-color;
+  -fx-background-color: -banana-focus-color;
+  -fx-text-fill: -dark-bg-color;
+}
+
+.tree-cell > .tree-disclosure-node > .arrow  {
+  -fx-background-color: -main-fg-color;
+}
+
+.tree-view:focused .tree-cell:focused > .tree-disclosure-node > .arrow  {
+  -fx-background-color: -dark-bg-color;
 }
 
 .tree-cell:filled:selected{
   -fx-background-color: transparent;
-  -fx-border-color: -main-blue-color;
+  -fx-border-color: -banana-focus-color;
   -fx-border-width: 3;
 }