fix(front): URL encode branch name in case in contains '&' or '?' character (#458)

## 📝 Description

renderedtext/project-tasks#2660

## ✅ Checklist
- [x] I have tested this change
- [x] ~This change requires documentation update~

Author: VeljkoMaksimovic

front/assets/js/blocked.js

@@ -112,7 +112,7 @@ export var Blocked = {
   },
 
   afterBuildHandler(branch, workflowId, checkUrl) {
-    var query = [`branch=${branch}`, `workflow_id=${workflowId}`].join("&")
+    var query = [`branch=${encodeURIComponent(branch)}`, `workflow_id=${encodeURIComponent(workflowId)}`].join("&")
     var url   = checkUrl + "?" + query
 
     console.log(`Checking workflows ${url}`)

front/assets/js/template_picker.js

@@ -155,7 +155,7 @@ export var TemplatePicker = {
   },
 
   afterCommitHandler: function(branch, commitSha, workflowTip, projectName) {
-    var query = [`branch=${branch}`, `commit_sha=${commitSha}`].join("&")
+    var query = [`branch=${encodeURIComponent(branch)}`, `commit_sha=${encodeURIComponent(commitSha)}`].join("&")
     var url   = "check_workflow?" + query
 
     console.log(`Checking workflows ${url}`)

front/assets/js/workflow_editor/components/commit_panel.js

@@ -223,7 +223,7 @@ export class CommitPanel {
   }
 
   afterCommitHandler(branch, commitSha) {
-    var query = [`branch=${branch}`, `commit_sha=${commitSha}`].join("&")
+    var query = [`branch=${encodeURIComponent(branch)}`, `commit_sha=${encodeURIComponent(commitSha)}`].join("&")
     var url   = this.paths.checkWorkflow + "?" + query
 
     console.log(`Checking workflows ${url}`)