fix: Create dataset polish/bug fix

[lyndsiWilliams]

SUMMARY

This PR implements the following polishes:

• Pagination on the table should be 25 by default (previously set to 10)
• Align refresh buttons in the left panel
• Align width of selected tables in left panel with search input
  • The width was only wrong when there was no scrollbar present. I implemented a function to detect if a scrollbar is present and apply padding only if there is no scrollbar
• Remove save button and ... dropdown menu from the top right of the header
  • An editing prop was added in the header component so that it can be reused when building the edit dataset component
• Brought the "Manage your databases here" blank state from SQL lab to the left panel
• Fixed a bug where the table wouldn't take the full height of the dataset panel when there is no "This table already has a dataset" banner at the top

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

BEFORE:

AFTER:

TESTING INSTRUCTIONS

• Go to http://localhost:9000/dataset/add/?testing
• Select a database and a schema
  • Select a schema with over 25 pages to see default for pagination
• Observe all the changes described above

ADDITIONAL INFORMATION

• [ ] Has associated issue:
• [ ] Required feature flags:
• [ ] Changes UI
• [ ] Includes DB Migration (follow approval process in SIP-59)
  • [ ] Migration is atomic, supports rollback & is backwards-compatible
  • [ ] Confirm DB migration upgrade and downgrade tested
  • [ ] Runtime estimates and downtime expectations provided
• [ ] Introduces new feature or API
• [ ] Removes existing feature or API

[codecov[bot]]

Codecov Report

Merging #22262 (985f6a9) into master (04b7a26) will increase coverage by 0.04%. The diff coverage is 76.66%.

@@            Coverage Diff             @@
##           master   #22262      +/-   ##
==========================================
+ Coverage   66.86%   66.90%   +0.04%     
==========================================
  Files        1846     1847       +1     
  Lines       70510    71241     +731     
  Branches     7723     8039     +316     
==========================================
+ Hits        47144    47665     +521     
- Misses      21364    21534     +170     
- Partials     2002     2042      +40     

Flag	Coverage Δ
hive	52.53% <ø> (ø)
javascript	54.04% <76.66%> (+0.25%)	:arrow_up:
mysql	?
postgres	78.02% <ø> (ø)
presto	52.42% <ø> (ø)
python	81.20% <ø> (-0.05%)	:arrow_down:
sqlite	76.49% <ø> (ø)
unit	50.92% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...d/src/SqlLab/components/SqlEditorLeftBar/index.tsx	52.11% <ø> (+0.05%)	:arrow_up:
...iews/CRUD/data/dataset/AddDataset/Header/index.tsx	57.14% <33.33%> (-24.68%)	:arrow_down:
...s/CRUD/data/dataset/AddDataset/LeftPanel/index.tsx	84.61% <50.00%> (-2.06%)	:arrow_down:
...erset-frontend/src/components/EmptyState/index.tsx	77.55% <75.00%> (-0.23%)	:arrow_down:
...a/dataset/AddDataset/DatasetPanel/DatasetPanel.tsx	90.19% <100.00%> (-1.48%)	:arrow_down:
...set-frontend/src/views/CRUD/data/dataset/styles.ts	100.00% <100.00%> (ø)
...d/src/views/CRUD/data/dataset/AddDataset/index.tsx	51.61% <0.00%> (-8.39%)	:arrow_down:
superset-frontend/src/views/CRUD/data/hooks.ts	57.69% <0.00%> (-5.95%)	:arrow_down:
superset/common/utils/dataframe_utils.py	90.47% <0.00%> (-4.77%)	:arrow_down:
... and 44 more

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[lyndsiWilliams]

/testenv up

[github-actions[bot]]

@lyndsiWilliams Ephemeral environment spinning up at http://52.24.161.135:8080. Credentials are admin/admin. Please allow several minutes for bootstrapping and startup.

[github-actions[bot]]

Ephemeral environment shutdown and build artifacts deleted.