fix(grid): stretched rows were broken on tablet size

A stretched row inside doubling grid was not stretched on tablet size.

Yes, i left the !important in because there are many grid selector combinations where it probably breaks other situations which would need much more investigation. As the !important was there before, i decided to leave it in for now.

src/definitions/collections/grid.less

@@ -1478,12 +1478,15 @@ each(@colors, {
     }
     .ui.grid > .doubling.row > .column,
     .ui.doubling.grid > .row > .column {
-      display: inline-block !important;
       padding-top: (@rowSpacing / 2) !important;
       padding-bottom: (@rowSpacing / 2) !important;
       box-shadow: none !important;
       margin: 0;
     }
+    .ui.grid:not(.stretched) > .doubling.row:not(.stretched) > .column:not(.stretched),
+    .ui.doubling.grid:not(.stretched) > .row:not(.stretched) > .column:not(.stretched) {
+      display: inline-block !important;
+    }
     .ui[class*="two column"].doubling.grid > .row > .column,
     .ui[class*="two column"].doubling.grid > .column:not(.row),
     .ui.grid > [class*="two column"].doubling.row.row > .column {