WIP: reconstruct layouts

* system-version

lib/views/widget/system-version.html

@@ -1,4 +1,4 @@
-<div class="system-version">
+<div class="system-version hidden-xs">
   <span>
     <a href="https://github.com/weseek/crowi-plus">crowi-plus</a> {{ crowiVersion() }}
   </span>

resource/styles/scss/_layout_crowi-plus.scss

@@ -25,8 +25,4 @@
   > span {
     margin-left: .5em;
   }
-
-  @media (max-width: $screen-xs-max) {
-    display: none;
-  }
 }

resource/styles/scss/_layout_crowi.scss

@@ -49,10 +49,6 @@
 
       display: flex;
       justify-content: space-between;
-
-      @media (max-width: $screen-sm-max) {
-        display: none;
-      }
     }
   }