fix closing search dropdown (#1142)

* using a different library for javascript selects, fixing the closing search dropdown
* fix closing dropdown for daterangepicker
* added missing search button for mobile on customer page
* fix meta fields with same names than existing columns

package.json

@@ -25,7 +25,6 @@
     "@symfony/webpack-encore": "^0.27.0",
     "admin-lte": "~2.4.8",
     "bootstrap-sass": "^3.3.7",
-    "bootstrap-select": "^1.13.1",
     "chart.js": "~2.8.0",
     "core-js": "^3.1.3",
     "daterangepicker": "^3.0.3",
@@ -38,6 +37,8 @@
     "moment": "^2.24.0",
     "node-sass": "^4.9.0",
     "sass-loader": "^7.0.2",
+    "select2": "^4.0.10",
+    "select2-bootstrap-theme": "^0.1.0-beta.10",
     "sweetalert2": "^8.11.7",
     "webpack-notifier": "^1.5.1"
   }