Submodule GitExtensionsTest updated

Submodule GitExtensionsTest:
    > 604b166 - Settings
SettingsCache implements IDisposable
Japanese translation improvement.
Revert "FirstVisibleRevisionBeforeUpdate fixed when changing repository"

This reverts commit c0d8fe640486ea3194626ebfc4209e949b6aa8a1.
Revert "Row selection fixed in RevisionGrid after updating"

This reverts commit 1f055aaae3c26269683b47af5baa8fca13c6b559.
Merge pull request #1822 from kunimitaiyoh/master

Japanese translation improvement
Restore old revision grid behavior before revert
Scrolling to first visible row fixed in RevisionGrid
Merge pull request #1827 from gitextensions/hotfix/revision-grid-refresh

Hotfix for revision grid refresh
ConfigFileSettingsCache
Use FileSystemWatcher to decrease disk reads
Clear hasn't good semantic
Merge remote-tracking branch 'origin/master' into feature/DistSettings
ConfigFile.GetValue with defaultValue parameter
WeakRefCache
Stash fixed for checkout branch dialog
Resized left panel in FormStash
Git settings on one page with effective view - WIP.
Fixes
Move encodings to ConfigFileSettings