Review use of fontWeight

lib/ui/app/FieldGrid.dart

@@ -23,7 +23,6 @@ class FieldGrid extends StatelessWidget {
                 localization.lookup(field),
                 overflow: TextOverflow.ellipsis,
                 style: TextStyle(
-                  fontWeight: FontWeight.w300,
                   color: textColor.withOpacity(.65),
                 ),
               ),

lib/ui/auth/login_view.dart

@@ -575,7 +575,6 @@ class _LoginState extends State<LoginView> {
                             _loginError,
                             style: TextStyle(
                               color: Colors.red,
-                              fontWeight: FontWeight.bold,
                             ),
                           ),
                         ),

lib/ui/dashboard/dashboard_chart.dart

@@ -164,8 +164,8 @@ class _DashboardChartState extends State<DashboardChart> {
                       children: <Widget>[
                         Text(localization.lookup(dataGroup.name),
                             style: theme.textTheme.headline5.copyWith(
-                                color: isSelected ? Colors.white : null,
-                                fontWeight: FontWeight.w400)),
+                              color: isSelected ? Colors.white : null,
+                            )),
                         SizedBox(height: 4.0),
                         Text(
                             formatNumber(dataGroup.total, context,
@@ -183,7 +183,6 @@ class _DashboardChartState extends State<DashboardChart> {
                                       : (isIncrease
                                           ? Colors.green
                                           : Colors.red),
-                                  fontWeight: FontWeight.bold,
                                 ),
                               )
                             : SizedBox(),

lib/ui/settings/templates_and_reminders.dart

@@ -548,10 +548,10 @@ class EmailPreview extends StatelessWidget {
                 padding: const EdgeInsets.all(14),
                 child: Text(
                   subject,
-                  style: Theme.of(context).textTheme.bodyText1.copyWith(
-                        color: Colors.black,
-                        fontWeight: FontWeight.w700,
-                      ),
+                  style: Theme.of(context)
+                      .textTheme
+                      .bodyText1
+                      .copyWith(color: Colors.black),
                 ),
               ),
               Expanded(