[git-stash, shelf] disable "Stashes and Shelves" tab by default

It requires improvements and additional features to be enabled by default

GitOrigin-RevId: e71c56bf924c952cec67a9a71e0d7116101215e0

plugins/git4idea/resources/META-INF/plugin.xml

@@ -503,7 +503,7 @@
                  description="If set to false, IDE will ignore configured WSL1 executables. See IDEA-242469"/>
     <registryKey key="git.detect.wsl.executables" defaultValue="true"
                  description="Search for available executables in WSL on Windows"/>
-    <registryKey key="git.enable.stash.toolwindow" defaultValue="true"
+    <registryKey key="git.enable.stash.toolwindow" defaultValue="false"
                  description="Show toolwindow tab with stashes and shelves together"/>
     <registryKey key="git.can.use.restore.command" defaultValue="true"
                  description="Use 'git restore --staged --worktree --source=HEAD -- paths' instead of 'git reset --hard' to speedup worktree cleanup."/>