Make changes to make it more flexible for new filters

app/assets/javascripts/filtered_search/filtered_search_manager.js.es6

@@ -101,7 +101,8 @@
           const match = gl.FilteredSearchTokenKeys.searchByKeyParam(keyParam);
 
           if (match) {
-            const sanitizedKey = keyParam.slice(0, keyParam.indexOf('_'));
+            const indexOf = keyParam.indexOf('_');
+            const sanitizedKey = indexOf !== -1 ? keyParam.slice(0, keyParam.indexOf('_')) : keyParam;
             const symbol = match.symbol;
             let quotationsToUse = '';
 
@@ -137,14 +138,19 @@
         const { param } = gl.FilteredSearchTokenKeys.searchByKey(token.key);
         let tokenPath = '';
 
+        let keyParam = token.key;
+        if (param) {
+          keyParam += `_${param}`;
+        }
+
         if (token.wildcard && condition) {
           tokenPath = condition.url;
         } else if (token.wildcard) {
           // wildcard means that the token does not have a symbol
-          tokenPath = `${token.key}_${param}=${encodeURIComponent(token.value)}`;
+          tokenPath = `${keyParam}=${encodeURIComponent(token.value)}`;
         } else {
           // Remove the token symbol
-          tokenPath = `${token.key}_${param}=${encodeURIComponent(token.value.slice(1))}`;
+          tokenPath = `${keyParam}=${encodeURIComponent(token.value.slice(1))}`;
         }
 
         paths.push(tokenPath);

app/assets/javascripts/filtered_search/filtered_search_token_keys.js.es6

@@ -57,7 +57,15 @@
     }
 
     static searchByKeyParam(keyParam) {
-      return tokenKeys.find(tokenKey => keyParam === `${tokenKey.key}_${tokenKey.param}`) || null;
+      return tokenKeys.find((tokenKey) => {
+        let tokenKeyParam = tokenKey.key;
+
+        if (tokenKey.param) {
+          tokenKeyParam += `_${tokenKey.param}`;
+        }
+
+        return keyParam === tokenKeyParam;
+      }) || null;
     }
 
     static searchByConditionUrl(url) {

app/assets/stylesheets/framework/filters.scss

@@ -89,6 +89,10 @@
     overflow-y: hidden;
     border-radius: 0;
 
+    .fa {
+      width: 15px;
+    }
+
     .dropdown-label-box {
       border-color: $white-light;
       border-style: solid;