Merge branch 'dev' into CAKE-20-update-exchange-and-send-screens

# Conflicts:
#	lib/di.dart
#	lib/palette.dart
#	lib/src/screens/base_page.dart
#	lib/src/screens/dashboard/dashboard_page.dart
#	lib/src/screens/receive/receive_page.dart

lib/src/widgets/alert_background.dart

@@ -0,0 +1,26 @@
+import 'dart:ui';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:cake_wallet/palette.dart';
+
+class AlertBackground extends StatelessWidget {
+  AlertBackground({@required this.child});
+
+  final Widget child;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      height: double.infinity,
+      width: double.infinity,
+      color: Colors.transparent,
+      child: BackdropFilter(
+        filter: ImageFilter.blur(sigmaX: 3.0, sigmaY: 3.0),
+        child: Container(
+          decoration: BoxDecoration(color: PaletteDark.darkNightBlue.withOpacity(0.75)),
+          child: child,
+        ),
+      ),
+    );
+  }
+}

lib/src/widgets/alert_close_button.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+
+class AlertCloseButton extends StatelessWidget {
+  AlertCloseButton({@required this.image});
+
+  final Image image;
+
+  @override
+  Widget build(BuildContext context) {
+    return Positioned(
+        bottom: 24,
+        child: GestureDetector(
+          onTap: () => Navigator.of(context).pop(),
+          child: Container(
+            height: 42,
+            width: 42,
+            decoration: BoxDecoration(
+              color: Colors.white,
+              shape: BoxShape.circle
+            ),
+            child: Center(
+              child: image,
+            ),
+          ),
+        )
+    );
+  }
+}

lib/src/widgets/cake_scrollbar.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+import 'package:cake_wallet/palette.dart';
+
+class CakeScrollbar extends StatelessWidget {
+  CakeScrollbar({
+    @required this.backgroundHeight,
+    @required this.thumbHeight,
+    @required this.fromTop
+  });
+
+  final double backgroundHeight;
+  final double thumbHeight;
+  final double fromTop;
+
+  @override
+  Widget build(BuildContext context) {
+    return Positioned(
+        right: 6,
+        child: Container(
+          height: backgroundHeight,
+          width: 6,
+          decoration: BoxDecoration(
+            color: PaletteDark.violetBlue,
+            borderRadius: BorderRadius.all(Radius.circular(3))
+          ),
+          child: Stack(
+            children: <Widget>[
+              AnimatedPositioned(
+                duration: Duration(milliseconds: 0),
+                top: fromTop,
+                child: Container(
+                  height: thumbHeight,
+                  width: 6.0,
+                  decoration: BoxDecoration(
+                    color: PaletteDark.wildBlueGrey,
+                    borderRadius: BorderRadius.all(Radius.circular(3))
+                  ),
+                ),
+              )
+            ],
+          ),
+        )
+    );
+  }
+}