Added FileBrowser.CustomSearchHandler event

Fixed WaitForSaveDialog no longer working on Android (fixed #107)

Disabled "Parse Escape Characters" of all TextMeshProUGUIs to avoid edge cases (fixed #106)

• Fixed UnauthorizedAccessException on iOS
• Tiny performance optimization

Added FileBrowser.CanDeleteFiles and CanRenameFiles properties to disable deleting/renaming files via file browser UI

• BREAKING CHANGE: Replaced RequestPermission with RequestPermissionAsync (see yasirkula/UnityNativeGallery#343)
• BREAKING CHANGE: CheckPermission returns bool instead of Permission (see yasirkula/UnityAndroidRuntimePermissions#14)
• Updated Unity version to 2021.3.41f1
• Upgraded Texts to TextMesh Pro (closed #82)
• Configurable Enter Play Mode is supported (disabling Domain Reload works but disabling Scene Reload isn't tested)
• FileBrowser.Instance is now public for convenience
• Removed nested canvases from SimpleFileBrowserCanvas prefab to make VR integration simpler

Fixed rare "No such proxy method" error for native callback functions

• Moved most UnityEvent registrations to the code (it fixes InputField.OnEndEdit being changed to InputField.OnSubmit on latest Unity versions, see: yasirkula/UnityTextToTextMeshProUpgradeTool#2)
• Minor memory optimization in RecycledListView
• Attempted to simplify the example code

Potential fix for IllegalStateException on Android

Fixed file browser not showing any contents in a folder if it contains a system-protected file/folder (happened with '.android_secure' folder on Android)