iA Writer 4+

This update fixes a few small bugs. It includes all the great features in iA Writer 6:

# Wikilinks
- Wikilinks make it easy to connect, browse, and rediscover your writing
- A [[wikilink]] is a link from one text file to another
- To make a wikilink, just type [[ and the name of the file you would like to link
- Autocomplete suggests files from your Library
- Open the linked file using the Open Link button in the keyboard bar, ⌘-click, or ⌘⏎
- If the file doesn’t exist, it’ll be automatically created and ready to type

# Navigation History
- Navigation history keeps track of the files you recently opened using wikilinks, Library, or Quick Search
- To go back and forward on iPhone, swipe right or left anywhere in the document
- To go back and forward on iPad, swipe right or left with two fingers anywhere in the document on screen
- Or hold ⌘ and swipe right or left on a trackpad

# Lightning Menu
- Fast access to your favorite formatting commands and features, right from the keyboard bar
- Available starting with iOS and iPadOS 15
- Fully configurable in Keyboard settings

# Split Preview on iPad
- Added ability to show Preview side-by-side with Editor
- Enable in the Preview appearance menu
- Scrolls in sync by default, configurable in Interface settings

# Hashtag Improvements
- Hashtags can be now added anywhere in text
- Autocomplete suggests hashtags as you type
- Consistent styling for hashtags and other links
- Show a hashtag in Quick Search using the Open Link button in the keyboard bar, ⌘-click, or ⌘⏎

# Autolinks
- All web links and email addresses are automatically detected
- Open a link in browser or compose a new email using the Open Link button in the keyboard bar, ⌘-click, or ⌘⏎
- Control how wikilinks, hashtags, and autolinks are exported in Markdown settings

# Content Block Improvements
- To add a content block, type / at the beginning of a line and the name of the file you would like to include
- Autocomplete suggests files from your Library
- A path to a file is no longer required. Filename-only content blocks automatically find the nearest matching file
- Open a text content block using the Open Link button in the keyboard bar, ⌘-click, or ⌘⏎
- If the content block file doesn’t exist, it’ll be automatically created and ready to type

# Metadata
- All-new metadata engine enables powerful new features
- Provide variables to text content blocks, width and height attributes to image content blocks
- Supports Markdown in metadata variables
- Define global metadata in Markdown settings

# Look and Feel
- Completed tasks are faded and crossed-out
- All-new highlight colors: yellow, orange, pink, purple, blue, and green
- Choose your favorite highlight color and configure completed task appearance in Editor settings

# Editor Improvements
- Editor automatically inserts closing brackets
- Select text and type an opening bracket to wrap selection in matching brackets
- Added indent width setting
- Changed strikethrough shortcut to ⌥⌘U
- Changed highlight shortcut to ⇧⌘U
- Changed code shortcut to ⌘J
- Added code block command with shortcut ⇧⌘J
- Disabled spell checking, autocorrection, autocapitalization, and smart punctuation in code
- Set up ⌘E shortcut to use selection for find
- Changed shortcut to mark task as completed to ⌥⌘X
- Redesigned find bar works much better with hardware keyboards, and provides direct access to matching style and case sensitivity on iOS and iPadOS 15

# Other Improvements
- Changed Library shortcut to ⌃⌘S
- Task list items are searchable with Smart Folders and Quick Search using [ ] and [x]
- Added ability to show and sort by date created in Library
- Added fuzzy Library Path matching to Quick Search
- Added an option to always show Editor and Preview toolbars, configurable in Interface settings
- Deleted folders and files are moved to Recently Deleted in Files app starting with iOS and iPadOS 14
- Integrated system menus on iOS and iPadOS 15