switch to using TypeScript

src/scss/components/_description.scss

@@ -0,0 +1,39 @@
+.side-properties {
+  flex: 0 0 150px;
+  margin: 5px 5px 5px 0;
+  padding-right: 5px;
+  border-right: 2px groove $c-border-groove;
+
+  .side-property {
+    margin: 2px 0;
+    display: flex;
+    flex-direction: row;
+
+    label {
+      flex: 2;
+      line-height: 26px;
+      font-weight: bold;
+    }
+
+    input,
+    select {
+      text-align: right;
+      flex: 1;
+      width: calc(100% - 2px);
+    }
+  }
+}
+
+.sheet-body .tab .editor {
+  height: 100%;
+}
+
+.tox {
+  .tox-editor-container {
+    background: $c-white;
+  }
+
+  .tox-edit-area {
+    padding: 0 8px;
+  }
+}