Add missing colons to headers

lib/components/history/kanji_box.dart

@@ -20,11 +20,11 @@ class KanjiBox extends StatelessWidget {
         aspectRatio: 1,
         child: Container(
           padding: const EdgeInsets.all(5),
+          alignment: Alignment.center,
           decoration: BoxDecoration(
             color: menuColors.background,
             borderRadius: BorderRadius.circular(10.0),
           ),
-          child: Center(
           child: FittedBox(
             child: Text(
               kanji,
@@ -36,7 +36,6 @@ class KanjiBox extends StatelessWidget {
           ),
         ),
       ),
-      ),
     );
   }
 }

lib/components/search/search_results_body/parts/other_forms.dart

@@ -16,7 +16,7 @@ class OtherForms extends StatelessWidget {
       children: forms.isNotEmpty
           ? [
               const Text(
-                'Other Forms',
+                'Other Forms:',
                 style: TextStyle(fontWeight: FontWeight.bold),
               ),
               Wrap(