Search dialogue shows up with "/" even when `search.engine = 0`(disabled)

[nobuto-m]

Describe the bug

Search dialogue shows up with "/" even when site.Params.search.engine = 0(disabled). And the dialogue is unusable since there is no search engine enabled.

To Reproduce

Steps to reproduce the behavior:

1. Clone starter-academic git clone https://github.com/wowchemy/starter-academic && cd starter-academic

2. Change the search.engine configuration as follows

   diff --git a/config/_default/params.toml b/config/_default/params.toml
   index 214e096..004bdf2 100644
   --- a/config/_default/params.toml
   +++ b/config/_default/params.toml
   @@ -226,17 +226,17 @@ plugins_js  = []
   ############################
   ## Search
   ############################
   [search]
   # Search provider:
   #   0: No search engine
   #   1: Academic (built-in)
   #   2: Algolia (https://www.algolia.com)
   -  engine = 1
   +  engine = 0
   
   # Configuration of Algolia search engine.
   # Paste the values from your Algolia dashboard.
   [search.algolia]
    app_id = ""
    api_key = ""
    index_name = ""
    show_logo = false

3. Run a local server with hugo server
4. Press "/" in the page

Expected behavior

Nothing happens ("/" will be ignored).

Technical details:

• Link to your GitHub project: N/A
• Wowchemy Version (from your go.mod): v0.0.0-20201224144527-9cce661db8d7
• Hugo Version (run hugo version): Hugo Static Site Generator v0.79.1/extended linux/amd64 BuildDate: 2020-12-22T14:06:09Z
• Browser/OS: Firefox 84 / Ubuntu 20.04 LTS
• Wowchemy Template: starter-academic

[gcushen]

Fixed by 25e0b0627f0965a221ad9b9e7a9c2ff33c01b657