主题切换样式调整

src/ibiz-core/components/app-mob-select-theme/app-mob-select-theme.less

@@ -13,14 +13,13 @@
   justify-content: end;
   align-items: center;
   flex-wrap: wrap;
-  padding: 12px;
 }
 .app-mob-select-theme_theme_item {
-  width: 70px;
-  height: 70px;
+  width: 20vw;
+  height: 20vw;
   border-radius: 50%;
   text-align: center;
-  line-height: 70px;
+  line-height: 20vw;
   font-size: 13px;
   margin: 8px;
 }
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