Fixes #2912: Cable type in filter form should be blank by default

CHANGELOG.md

@@ -14,6 +14,7 @@ v2.5.7 (FUTURE)
 * [#2895](https://github.com/digitalocean/netbox/issues/2895) - Fix filtering of nullable character fields
 * [#2901](https://github.com/digitalocean/netbox/issues/2901) - Fix ordering regions by site count
 * [#2910](https://github.com/digitalocean/netbox/issues/2910) - Fix config context list and edit forms to use Select2 elements
+* [#2912](https://github.com/digitalocean/netbox/issues/2912) - Cable type in filter form should be blank by default
 * [#2913](https://github.com/digitalocean/netbox/issues/2913) - Fix assigned prefixes link on VRF view
 * [#2914](https://github.com/digitalocean/netbox/issues/2914) - Fix empty connected circuit link on device interfaces list
 

netbox/dcim/forms.py

@@ -2753,7 +2753,7 @@ class CableFilterForm(BootstrapMixin, forms.Form):
         label='Search'
     )
     type = forms.MultipleChoiceField(
-        choices=CABLE_TYPE_CHOICES,
+        choices=add_blank_choice(CABLE_TYPE_CHOICES),
         required=False,
         widget=StaticSelect2()
     )