Playbook attributes rendering ignores soft-set attributes

Related to issue #776

Steps to reproduce

1. Define an attribute in the playbook like :attribute: number 1@.
2. Define an attribute on a page like :attribute: number 2.
3. Refer to an attribute on the page from step 2 like {attribute}
4. Attribute on a page is still rendered as “number 1”.

Expected behavior:

Attribute on step 3 is rendered as number 2.

Environment

Plugin Version: 0.35.8

IntelliJ Details: IntelliJ IDEA 2021.2.3 (Community Edition) Build #IC-212.5457.46, built on October 12, 2021 Runtime version: 11.0.12+7-b1504.40 amd64 VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o. Windows 10 10.0 GC: G1 Young Generation, G1 Old Generation Memory: 2044M Cores: 8 Non-Bundled Plugins: com.github.jk1.ytplugin (2021.3.16), PlantUML integration (5.6.1), org.asciidoctor.intellij.asciidoc (0.35.8) Kotlin: 212-1.5.31-release-546-IJ4638.7

[ahus1]

There is now pre-release 0.35.11 that fixes a bug in 0.35.10.

[ahus1]

Please keep this issue, as it adds details and test cases, plus the fact that I should test this with playbooks as well.