feat(UI): add skin support

mainwindow.ui

@@ -77,11 +77,11 @@ QPushButton {
 }
 
 QPushButton:hover {
-	background-color: rgba(255, 255, 255, 220);
+	background-color: rgba(0, 85, 255, 120);
 }
 
 QPushButton:pressed {
-	background-color: rgba(255, 255, 255, 250);
+	background-color: rgba(0, 85, 255, 250);
 }
 
 QPushButton#closeWindowBtn {
@@ -101,6 +101,12 @@ QLabel {
 
 QLabel#coverLabel {
 	border: 1px solid grey;
+}
+
+/****** ListView ******/
+
+QListView {
+	background: rgba(0, 0, 0, 50);
 }</string>
   </property>
   <property name="locale">
@@ -220,7 +226,7 @@ QLabel#coverLabel {
             </spacer>
            </item>
            <item>
-            <widget class="QPushButton" name="miniModeBtn">
+            <widget class="QPushButton" name="setSkinBtn">
              <property name="maximumSize">
               <size>
                <width>25</width>
@@ -228,7 +234,17 @@ QLabel#coverLabel {
               </size>
              </property>
              <property name="text">
-              <string>^</string>
+              <string/>
+             </property>
+             <property name="icon">
+              <iconset resource="resources.qrc">
+               <normaloff>:/icons/icons/skin.png</normaloff>:/icons/icons/skin.png</iconset>
+             </property>
+             <property name="iconSize">
+              <size>
+               <width>24</width>
+               <height>24</height>
+              </size>
              </property>
             </widget>
            </item>