[Bug]: Unexpectedly wide spacing between the 'Project view' and the 'Editor'

[kevin-lee]

Describe the bug

In the latest IntelliJ IDEA EAP (2024.1 Beta), there's unexpectedly wide spacing between the Project view and the Editor like the following screen shot.

It disappears if I disable Material Theme UI, and I don't have this issue with IntelliJ IDEA 2023.3.

Also the buttons have too much spacing.

To Reproduce

Install IntelliJ IDEA 2024.1 Beta (the current EAP) and run it with Material Theme UI enabled.

Expected behavior

Not too much spacing

Material Theme Version

v9.0.0

IDE

IntelliJ IDEA

System Info

IntelliJ IDEA 2024.1 Beta (Ultimate Edition)
Build #IU-241.14494.17, built on March 6, 2024
Licensed to IntelliJ IDEA EAP user: ...
Expiration date: April 5, 2024
Runtime version: 17.0.10+8-b1207.6 aarch64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
macOS 13.6.4
GC: G1 Young Generation, G1 Old Generation
Memory: 3072M
Cores: 10
Metal Rendering is ON
Registry:
  undo.documentUndoLimit=500
  ide.tooltip.initialDelay=507
  ide.balloon.shadow.size=0
  editor.distraction.free.mode=true
  editor.focus.mode.color.light=777777
  editor.focus.mode.color.dark=777777
  debugger.new.tool.window.layout=true
  ide.new.editor.tabs.vertical.borders=true
  ide.animate.toolwindows=true
  ide.experimental.ui=true
  ide.editor.tab.selection.animation=true
  scala.erase.compiler.process.jdk.once=false
Non-Bundled Plugins:
  com.intellij.plugins.expui (0.4)
  com.jetbrains.rust (241.24015.155)
  com.jetbrains.space (241.14494.17)
  org.jetbrains.settingsRepository (241.14494.17)
  com.andrey4623.rainbowcsv (2.0.2)
  com.wakatime.intellij.plugin (14.3.11)
  com.intellij.kubernetes (241.14494.25)
  String Manipulation (9.12.0)
  org.jetbrains.plugins.hocon (2024.1.0)
  GrepConsole (12.25.0-IJ2023.3)
  com.intellij.ml.llm (241.14494.33)
  izhangzhihao.rainbow.brackets (2024.2.1)
  com.chrisrm.idea.MaterialThemeUI (9.0.0)
  mdx.js (241.14494.17)
  com.mallowigi (95.0.0)
  org.intellij.scala (2024.1.576)
Kotlin: 241.14494.17-IJ

Logs/Screenshots

No response

[mallowigi]

Please read the changelog folks. It is described there as a new feature "Centered Editor"

For the buttons, it's the first time I saw that. Please open a separate issue.

[kevin-lee]

@mallowigi Thank you. It's fine after turning off Centered Editor. It would have been better if the default behavior wasn't changed though.

I've created another ticket for the button margin issue (#470)