Codex v1.2.2

Changelog:

• Enabled spellcheck in the editor
• Smaller font size on code blocks
• Reworked settings page
• Added shift-tab keybind in code blocks
• Remade about page
• Fixed pdf background
• Fixed context menus going off-screen
• Fixed text on "rename" button
• Fixed heading alignment problem
• Align buttons disable when in code block
• Toolbar buttons & size stay constant
• Fixed text being white when selecting parent node
• Re-enabled "select parent node" button
• The mark buttons disable when in code block
• Made editor toolbar more opaque
• Changed license