Merge branch 'feat/ui-1.0.3' into 'test'

Feat/ui 1.0.3

See merge request opensource/answer!419

ui/README.md

@@ -71,7 +71,7 @@ If you would like to help us with the i18n translation, please visit [Answer@Cro
             ├── common (project information/data defined here)
             ├── components (all components of the project)
             ├── hooks (all hooks of the project)
-            ├── i18n (Initialize the front-end i18n)
+            ├── i18n (Used only to initialize the front-end i18n tool)
             ├── pages (all pages of the project)
             ├── router (Project routing definition)
             ├── services (all data api of the project)

ui/src/common/_variable.scss

@@ -1,3 +1,5 @@
 $link-hover-decoration: none;
 $enable-negative-margins: true;
 $blue: #0033FF !default;
+$placeholder-opacity-max: .2;
+$placeholder-opacity-min: .1;