Change z-index btn menu of application detail

[hongky-1994]

What this PR does:

• Change z-index of button Open menu in application detail page.

Why we need it:

• Button Open menu of application detail page is behind nodes graph. It should have higher z-index.

Which issue(s) this PR fixes:

Does this PR introduce a user-facing change?: No

• How are users affected by this change: No
• Is this breaking change: No
• How to migrate (if breaking change): No

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 28.76%. Comparing base (0090b2b) to head (0dda796).
⚠️ Report is 9 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6282   +/-   ##
=======================================
  Coverage   28.76%   28.76%           
=======================================
  Files         560      560           
  Lines       59834    59834           
=======================================
+ Hits        17209    17211    +2     
+ Misses      41304    41301    -3     
- Partials     1321     1322    +1     

Flag	Coverage Δ
.	23.22% <ø> (+0.01%)	⬆️
.-pkg-app-pipedv1-plugin-analysis	32.64% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	58.35% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.63% <ø> (ø)
.-pkg-app-pipedv1-plugin-scriptrun	54.83% <ø> (ø)
.-pkg-app-pipedv1-plugin-terraform	39.56% <ø> (ø)
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-waitapproval	54.40% <ø> (ø)
.-pkg-plugin-sdk	50.14% <ø> (-0.20%)	⬇️
.-tool-actions-gh-release	19.23% <ø> (ø)
.-tool-actions-plan-preview	25.51% <ø> (ø)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (ø)

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[khanhtc1202]

Good catch 👍

[khanhtc1202]

@hongky-1994 DCO check is failed, please sign off the commit 🙏