message: Fix add reactions prompt button jumping timeline if font set lower than default
diff: @@ -20,7 +20,8 @@ limitations under the License.
  .mx_ReactionsRow_addReactionButton {
  position: relative;
  - display: none; // show on hover of the .mx_EventTile
  + display: inline-block;
  + visibility: hidden; // show on hover of the .mx_EventTile
  width: 24px;
  height: 24px;
  vertical-align: middle;
  @@ -39,7 +40,7 @@ limitations under the License.
  }
  &.mx_ReactionsRow_addReactionButton_active {
  - display: inline-block; // keep showing whilst the context menu is shown
  + visibility: visible; // keep showing whilst the context menu is shown
  }
  &:hover, &.mx_ReactionsRow_addReactionButton_active {
  @@ -51,7 +52,7 @@ limitations under the License.
  }
  .mx_EventTile:hover .mx_ReactionsRow_addReactionButton {
  - display: inline-block;
  + visibility: visible;
  }
  .mx_ReactionsRow_showAll {
  