Improve select picture page layout

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.33
-app.versionCode=33
+app.versionName=0.0.34
+app.versionCode=34

lib/screens/home.dart

@@ -16,7 +16,7 @@ class Home extends StatelessWidget {
 
   Color themePrimaryColor = Colors.blue;
   double _tipImageSize = 100;
-  int _selectImageColumnsCount = 2;
+  int _selectImageColumnsCount = 3;
 
   Future<void> resetGame(Data myProvider) async {
     myProvider.updateImage = '';
@@ -55,9 +55,10 @@ class Home extends StatelessWidget {
     myProvider.updateImages = images;
   }
 
-  Container _buildImageSelectorItem(Data myProvider, String image, double selectImageSize, double tileImageSize) {
+  Container _buildImageSelectorItem(Data myProvider, String image, double tileImageSize) {
     return Container(
       child: FlatButton(
+        padding: EdgeInsets.all(2),
         child: Container(
           decoration: BoxDecoration(
             borderRadius: BorderRadius.circular(4),
@@ -66,11 +67,8 @@ class Home extends StatelessWidget {
               width: 4,
             ),
           ),
-          margin: EdgeInsets.all(2),
           child: Image(
             image: AssetImage(getImageAssetName(image)),
-            width: selectImageSize,
-            height: selectImageSize,
             fit: BoxFit.fill
           ),
         ),
@@ -79,7 +77,7 @@ class Home extends StatelessWidget {
     );
   }
 
-  Container _buildImageSelector(Data myProvider, double size, double tileImageSize) {
+  Container _buildImageSelector(Data myProvider, double tileImageSize) {
     if (myProvider.images.length == 0) {
       getImagesList(myProvider);
     }
@@ -99,7 +97,11 @@ class Home extends StatelessWidget {
                       Column(
                         children: [
                           if (imageIndex + columnIndex < images.length)
-                            _buildImageSelectorItem(myProvider, images[imageIndex + columnIndex], size, tileImageSize)
+                            _buildImageSelectorItem(
+                              myProvider,
+                              images[imageIndex + columnIndex],
+                              tileImageSize
+                            )
                         ]
                       ),
                   ]
@@ -369,7 +371,6 @@ class Home extends StatelessWidget {
 
     var content;
 
-    double _selectorImageSize = (MediaQuery.of(context).size.width - 140) / _selectImageColumnsCount;
     double _tileImageSize = (MediaQuery.of(context).size.width - 70) / _myProvider.tilesCount;
 
     if (_myProvider.isShufflingBoard) {
@@ -377,7 +378,7 @@ class Home extends StatelessWidget {
       precacheImage(new AssetImage('assets/icons/game_win.png'), context);
     } else {
       if (_myProvider.image == '') {
-        content = _buildImageSelector(_myProvider, _selectorImageSize, _tileImageSize);
+        content = _buildImageSelector(_myProvider, _tileImageSize);
       } else {
         content = _buildGameWidget(_myProvider);
       }