[optimize] linux or win show contral bar

Author: Hiram

src/renderer/src/layouts/components/SystemControl.vue

@@ -10,6 +10,7 @@ const { platform } = process;
 
 <style lang="less" scoped>
 .system-controls {
+  flex: 1;
   position: relative;
   width: 102px;
   height: 100%;