billing: Add width property CSS for text inputs.

This commit adds width property CSS rule for text inputs
in billing.css to 206px, as we are going to remove the
bootstrap CSS rule which sets width to 206px in further
commits.

web/styles/portico/billing.css

@@ -197,6 +197,11 @@
         width: 50px;
     }
 
+    #licenses_at_next_renewal_input,
+    #new_licenses_input {
+        width: 206px;
+    }
+
     #error-message-box {
         margin-top: 10px;
         font-weight: 600;