Fix missing progress bar in files drop view

[PVince81]

Description

The uploader is expecting the progress bar element to be in the DOM when
created. This fix makes sure to append the PublicUploadView's element to
the DOM before rendering it.

Related Issue

https://github.com/owncloud/enterprise/issues/3281

Regression introduced through #32170 where the progress bar stops working.

Motivation and Context

How Has This Been Tested?

Manual test.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:

Open tasks:

• backport to release-10.2.0

[codecov]

Codecov Report

Merging #35032 into master will not change coverage.
The diff coverage is 0%.

@@            Coverage Diff            @@
##             master   #35032   +/-   ##
=========================================
  Coverage     65.37%   65.37%           
  Complexity    18622    18622           
=========================================
  Files          1215     1215           
  Lines         70510    70510           
  Branches       1295     1295           
=========================================
  Hits          46095    46095           
  Misses        24041    24041           
  Partials        374      374

Flag	Coverage Δ	Complexity Δ
#javascript	52.85% <0%> (ø)	0 <0> (ø)	⬇️
#phpunit	66.81% <ø> (ø)	18622 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
apps/files_sharing/js/PublicUploadView.js	67.39% <0%> (ø)	0 <0> (ø)	⬇️

---

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[codecov]

Codecov Report

Merging #35032 into master will not change coverage.
The diff coverage is 0%.

@@            Coverage Diff            @@
##             master   #35032   +/-   ##
=========================================
  Coverage     65.37%   65.37%           
  Complexity    18622    18622           
=========================================
  Files          1215     1215           
  Lines         70510    70510           
  Branches       1295     1295           
=========================================
  Hits          46095    46095           
  Misses        24041    24041           
  Partials        374      374

Flag	Coverage Δ	Complexity Δ
#javascript	52.85% <0%> (ø)	0 <0> (ø)	⬇️
#phpunit	66.81% <ø> (ø)	18622 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
apps/files_sharing/js/PublicUploadView.js	67.39% <0%> (ø)	0 <0> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5b2c425...92f4e60. Read the comment docs.

[codecov]

Codecov Report

Merging #35032 into master will not change coverage.
The diff coverage is 0%.

@@            Coverage Diff            @@
##             master   #35032   +/-   ##
=========================================
  Coverage     65.37%   65.37%           
  Complexity    18622    18622           
=========================================
  Files          1215     1215           
  Lines         70510    70510           
  Branches       1295     1295           
=========================================
  Hits          46095    46095           
  Misses        24041    24041           
  Partials        374      374

Flag	Coverage Δ	Complexity Δ
#javascript	52.85% <0%> (ø)	0 <0> (ø)	⬇️
#phpunit	66.81% <ø> (ø)	18622 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
apps/files_sharing/js/PublicUploadView.js	67.39% <0%> (ø)	0 <0> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5b2c425...92f4e60. Read the comment docs.

[sharidas]

LGTM 👍