Preserve QExcell cell notes in XLSX

src/styles.css

@@ -668,6 +668,12 @@ button {
   font-size: 11px;
 }
 
+.office-field > span {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+}
+
 .office-field input,
 .office-field select {
   min-width: 110px;
@@ -677,6 +683,13 @@ button {
   min-width: 190px;
 }
 
+.cell-comment-field {
+  min-width: 220px;
+  min-height: 38px;
+  padding: 6px 8px;
+  resize: vertical;
+}
+
 .office-check {
   display: inline-flex;
   align-items: center;
@@ -1080,6 +1093,22 @@ button {
   text-decoration: underline;
 }
 
+.sheet-grid td.is-commented {
+  position: relative;
+}
+
+.sheet-grid td.is-commented::after {
+  position: absolute;
+  top: 1px;
+  right: 1px;
+  width: 0;
+  height: 0;
+  border-top: 9px solid #f59e0b;
+  border-left: 9px solid transparent;
+  content: "";
+  pointer-events: none;
+}
+
 .sheet-grid td.is-wrapped {
   height: 58px;
 }