Enable Save button as soon as the remarks are changed.

Closes #199.

lib/www/client/source/src/components/event-edit.vue

@@ -384,6 +384,11 @@ export default {
         return true;
       }
 
+      // The user is editing the remarks
+      if (this.entryRemarksText != this.entryRemarksInput) {
+        return true;
+      }
+
       // Selected label set distinct from input labels
       if (distinctSets(this.selectedLabels, this.entryLabels, (i) => i.text)) {
         return true;
@@ -632,6 +637,12 @@ export default {
     },
 
     save () {
+      // In case the focus goes directly from the remarks field
+      // to the Save button.
+      if (this.entryRemarksInput != this.entryRemarksText) {
+        this.entryRemarks = this.entryRemarksInput;
+      }
+
       const data = {
         id: this.id,
         remarks: this.entryRemarksText,