Minor design fixes

lib/components/avatar.dart

@@ -48,7 +48,7 @@ class Avatar extends StatelessWidget {
               )
             : null,
         backgroundColor: noPic
-            ? name?.color ?? Theme.of(context).secondaryHeaderColor
+            ? name?.lightColor ?? Theme.of(context).secondaryHeaderColor
             : Theme.of(context).secondaryHeaderColor,
         child: noPic
             ? Text(fallbackLetters, style: TextStyle(color: Colors.white))

lib/utils/string_color.dart

@@ -2,6 +2,15 @@ import 'package:flutter/material.dart';
 
 extension StringColor on String {
   Color get color {
+    var number = 0.0;
+    for (var i = 0; i < length; i++) {
+      number += codeUnitAt(i);
+    }
+    number = (number % 10) * 25.5;
+    return HSLColor.fromAHSL(1, number, 1, 0.35).toColor();
+  }
+
+  Color get lightColor {
     var number = 0.0;
     for (var i = 0; i < length; i++) {
       number += codeUnitAt(i);

lib/views/chat_list.dart

@@ -298,7 +298,8 @@ class _ChatListState extends State<ChatList> {
                     title: selectMode == SelectMode.share
                         ? Text(L10n.of(context).share)
                         : Padding(
-                            padding: EdgeInsets.all(8),
+                            padding:
+                                EdgeInsets.only(top: 8, bottom: 8, right: 8),
                             child: TextField(
                               autocorrect: false,
                               controller: searchController,