migrate to CSS variables

Author: Abbe98

module/styles/commons-importing-controller.less

@@ -26,7 +26,6 @@
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-@import-less url("theme.less");
 
 .commons-panel {
   margin-bottom: 2em;
@@ -89,8 +88,8 @@ table.parsing-options-table {
 
 .commons-importing-wizard-header {
   font-size: 1.3em;
-  background: @chrome_primary;
-  padding: @padding_tight;
+  background: var(--chrome-primary);
+  padding: var(--padding-tight);
   }
 
 .commons-importing-parsing-data-panel {
@@ -112,7 +111,7 @@ table.parsing-options-table {
   font-size: 1.3em;
   position: absolute;
   overflow: auto;
-  border-top: 5px solid @chrome_primary;
+  border-top: 5px solid var(--chrome-primary);
   background: white;
-  padding: @padding_looser;
+  padding: var(--padding-looser);
   }