Replace TextIconButton for SensitiveButton to IconButton (#3759)

* Replace TextIconButton for SensitiveButton to IconButton

* line-height

app/javascript/styles/components.scss

@@ -306,6 +306,18 @@
   line-height: 27px;
 }
 
+.compose-form__sensitive-button {
+  display: none;
+
+  &.compose-form__sensitive-button--visible {
+    display: block;
+  }
+
+  .compose-form__sensitive-button__icon {
+    line-height: 27px;
+  }
+}
+
 .compose-form__upload-wrapper {
   overflow: hidden;
 }