chore(sass): fix linter errors

src/components/popover/popover.md.scss

@@ -19,11 +19,9 @@ $popover-md-item-background:           $popover-md-background !default;
 }
 
 .popover-content {
+  width: $popover-md-width;
   min-width: 0;
   min-height: 0;
-
-  width: $popover-md-width;
-
   max-height: $popover-md-max-height;
 
   border-radius: $popover-md-border-radius;

src/components/popover/popover.scss

@@ -39,6 +39,7 @@ ion-popover {
   ion-page {
     position: relative;
     display: flex;
+
     height: auto;
   }
 }