Fix editor commit to new branch if PR disabled (#8375) (#8401)

options/locale/locale_en-US.ini

 editor.commit_message_desc = Add an optional extended description…
 editor.commit_directly_to_this_branch = Commit directly to the <strong class="branch-name">%s</strong> branch.
 editor.create_new_branch = Create a <strong>new branch</strong> for this commit and start a pull request.
+editor.create_new_branch_np = Create a <strong>new branch</strong> for this commit.
 editor.propose_file_change = Propose file change
 editor.new_branch_name_desc = New branch name…
 editor.cancel = Cancel

routers/repo/editor.go

 		}
 	}
 
-	if form.CommitChoice == frmCommitChoiceNewBranch {
+	if form.CommitChoice == frmCommitChoiceNewBranch && ctx.Repo.Repository.UnitEnabled(models.UnitTypePullRequests) {
 		ctx.Redirect(ctx.Repo.RepoLink + "/compare/" + ctx.Repo.BranchName + "..." + form.NewBranchName)
 	} else {
 		ctx.Redirect(ctx.Repo.RepoLink + "/src/branch/" + util.PathEscapeSegments(branchName) + "/" + util.PathEscapeSegments(form.TreePath))
 	}
 
 	ctx.Flash.Success(ctx.Tr("repo.editor.file_delete_success", ctx.Repo.TreePath))
-	if form.CommitChoice == frmCommitChoiceNewBranch {
+	if form.CommitChoice == frmCommitChoiceNewBranch && ctx.Repo.Repository.UnitEnabled(models.UnitTypePullRequests) {
 		ctx.Redirect(ctx.Repo.RepoLink + "/compare/" + ctx.Repo.BranchName + "..." + form.NewBranchName)
 	} else {
 		treePath := filepath.Dir(ctx.Repo.TreePath)
 		return
 	}
 
-	if form.CommitChoice == frmCommitChoiceNewBranch {
+	if form.CommitChoice == frmCommitChoiceNewBranch && ctx.Repo.Repository.UnitEnabled(models.UnitTypePullRequests) {
 		ctx.Redirect(ctx.Repo.RepoLink + "/compare/" + ctx.Repo.BranchName + "..." + form.NewBranchName)
 	} else {
 		ctx.Redirect(ctx.Repo.RepoLink + "/src/branch/" + util.PathEscapeSegments(branchName) + "/" + util.PathEscapeSegments(form.TreePath))

templates/repo/editor/commit_form.tmpl

 				</div>
 			</div>
 			<div class="field">
+				{{$pullRequestEnabled := .Repository.UnitEnabled $.UnitTypePullRequests}}
+				{{$prUnit := .Repository.MustGetUnit $.UnitTypePullRequests}}
 				<div class="ui radio checkbox">
-					<input type="radio" class="js-quick-pull-choice-option" name="commit_choice" value="commit-to-new-branch" button_text="{{.i18n.Tr "repo.editor.propose_file_change"}}" {{if eq .commit_choice "commit-to-new-branch"}}checked{{end}}>
+					{{if $pullRequestEnabled}}
+						<input type="radio" class="js-quick-pull-choice-option" name="commit_choice" value="commit-to-new-branch" button_text="{{.i18n.Tr "repo.editor.propose_file_change"}}" {{if eq .commit_choice "commit-to-new-branch"}}checked{{end}}>
+					{{else}}
+						<input type="radio" class="js-quick-pull-choice-option" name="commit_choice" value="commit-to-new-branch" button_text="{{.i18n.Tr "repo.editor.commit_changes"}}" {{if eq .commit_choice "commit-to-new-branch"}}checked{{end}}>
+					{{end}}
 					<label>
 						<i class="octicon octicon-git-pull-request" height="16" width="12"></i>
-						{{.i18n.Tr "repo.editor.create_new_branch" | Safe}}
+						{{if $pullRequestEnabled}}
+							{{.i18n.Tr "repo.editor.create_new_branch" | Safe}}
+						{{else}}
+							{{.i18n.Tr "repo.editor.create_new_branch_np" | Safe}}
+						{{end}}
 					</label>
 				</div>
 			</div>