Fixed some UI bugs, and redesigned some UI elements.

- Changed class structure (added dialogs, cells folder)
- Changed font to Baloo as it has better font height
- Figured out a way to change the font color of max player slider thumb
- Added cursor effect when mouse hover on any button
- Fixed drop shadow bug for lobby view player cell
- Moved drop shadow effect from player cell controller to css

#story[1245]

src/main/resources/css/cells/ServerCell.css

@@ -0,0 +1,30 @@
+#serverListCell {
+    -fx-background-color: -fx-pp-front-color;
+    -fx-effect: -fx-pp-dropshadow-light;
+}
+
+#serverListCell:hover {
+    -fx-effect: -fx-pp-dropshadow-dark;
+}
+
+#serverCellVBox {
+    -fx-background-color: -fx-pp-background-color;
+}
+
+#serverConnButton {
+    -fx-background-color: -fx-pp-theme-color;
+    -fx-font-size: 14px;
+    -fx-text-fill: -fx-pp-light-text-color;
+}
+
+#serverName, #serverPlayerCount, #mapName {
+    -fx-text-fill: -fx-pp-dark-text-color;
+}
+
+#serverName {
+    -fx-font-size: 20px;
+}
+
+#serverPlayerCount, #mapName {
+    -fx-font-size:14px;
+}