feat(workflows): allow (un)soft locking threads

As per the discussion in
https://groups.google.com/g/twpowertools-discuss/c/wMd-sLaL5to/m/azbJTXPgAAAJ
this CL adds the ability to soft lock and unsoft lock threads in
workflows.

Bug: twpowertools:74
Change-Id: I1a5df7bc84cb20bbbc46d6fc0591679f8015113d
diff --git a/src/workflows/manager/components/actions/Attribute.js b/src/workflows/manager/components/actions/Attribute.js
index 150e7da..7ab9a87 100644
--- a/src/workflows/manager/components/actions/Attribute.js
+++ b/src/workflows/manager/components/actions/Attribute.js
@@ -11,8 +11,6 @@
 
 const kHiddenActions = [
   pb.workflows.Action.AttributeAction.AttributeAction.AA_NONE,
-  pb.workflows.Action.AttributeAction.AttributeAction.AA_SOFT_LOCK,
-  pb.workflows.Action.AttributeAction.AttributeAction.AA_UNSOFT_LOCK,
 ];
 
 export default class WFActionAttribute extends LitElement {