fix: support multiple lines in transaction note editing

closes #305

Author: sneurlax

lib/pages/exchange_view/edit_trade_note_view.dart

@@ -104,6 +104,10 @@ class _EditNoteViewState extends ConsumerState<EditTradeNoteView> {
                                 autocorrect: Util.isDesktop ? false : true,
                                 enableSuggestions:
                                     Util.isDesktop ? false : true,
+                                minLines: 3,
+                                maxLines: 6,
+                                keyboardType: TextInputType.multiline,
+                                textInputAction: TextInputAction.newline,
                                 controller: _noteController,
                                 style: STextStyles.field(context),
                                 focusNode: noteFieldFocusNode,

lib/pages/wallet_view/transaction_views/edit_note_view.dart

@@ -126,6 +126,10 @@ class _EditNoteViewState extends ConsumerState<EditNoteView> {
                   child: TextField(
                     autocorrect: Util.isDesktop ? false : true,
                     enableSuggestions: Util.isDesktop ? false : true,
+                    minLines: 3,
+                    maxLines: 6,
+                    keyboardType: TextInputType.multiline,
+                    textInputAction: TextInputAction.newline,
                     controller: _noteController,
                     style:
                         isDesktop