devel/okteta: update to 0.26.11, latest upstream

From the release announcement mail:

Changes since 0.26.10:

• Improved: translations
• Improved: Search tool: store used settings in the config
• Improved: Replace tool: store used settings in the config
• Improved: Select range tool: store used settings in the config
• Improved: Goto tool: store used settings in the config
• Improved: Pattern generator: store also used input encoding in the config
• Improved: Statistics tool: add option to copy data to clipboard
• Improved: Statistics tool: use consistent formatting for percent column
• Improved: Structures tool: enable context menu for array & string elements
• Improved: Structures tool: show tooltip for array & string elements
• Fixed: Search tool: prevent crash on backward search with empty array
• Fixed: Search tool: enhance/fix search behaviour with existing selection
• Fixed: Search tool: don't reset stored search direction on first dialog show
• Fixed: Replace tool: prevent crash on backward search with empty array
• Fixed: Replace tool: enhance/fix search behaviour with existing selection
• Fixed: Structures tool: fix parsing 3 and 4 byte UTF-8 sequences
• Fixed: Structures tool: fix outdated error indices for UTF-8 string decoding
• Fixed: unit tests accidentally shared working directories BUG: 467541
• Changed: Select range tool: move "Relative to end" field next to end input
• Changed: Search tool: disable automagic for "In selection" checkbox BUG: 441925
• Changed: Replace tool: disable automagic for "In selection" checkbox BUG: 441925