Fixes #4827: default config for functional tests of both basic and advanced app now turns off CSRF validation while providing commented out alternative setting cookie domain to localhost

[skip ci] docs/guide-ja/structure-entry-scripts.md added

[skip ci] Added Compare with Clipboard tip for Aptana Studio

[ci skip] docs/guide corrections

docs/guide-ja/structure-overview.md added [ci skip]

Code style fixes

close #5763

close #5762

docs/internals-ja/core-code-style.md added [ci skip]

[ci skip] Fixed typo for "Uplaods" to "Uploads" on line 116

Just another example...

docs/guide-ja/start-gii.md added [ci skip]

- small changes to docs/guide-ja/start-forms.md [ci skip]
- docs/guide-ja/start-databases.md added [ci skip]

close #5750

close #5751

Fixes #5735: Added `yii\bootstrap\Tabs::renderTabContent` to support manually rendering tab contents

Fixes #5708