Add +[NSObject castFrom:]

searching all sessions with current selections for the one whose selection
was created most recently. This way even if the selection is emoved, you
can still paste it. Brought up in email, subject line "Keep selected text
in buffer until I select another text (like Mac terminal does)".

Improvements for services. Only validate services that don't expect us to send data, unless we have a selection. If we do have a selection, it must take plain text as input. likewise, the service must produce no or plain text output. If it does produce output, call insertText: with it.

Issue 5942

Allow more services (those that do not produce input and those that accept input) to appear in the services menu. Issue 5942

Hold option to scroll into history while in alternate screen when scroll wheel is in send-arrow-keys-in-alt-screen mode

- Resizing a session would clear the find state, removing search results until the next search
- Clearing a buffer would remove highlights but not search results so they wouldn't reappear

Issue 5865.

Refactor the man page viewer into a more general single-purpose window. Add a smart selection action to run a command in a single-purpose window. Issue 5862.

Limit the number of characters that are searched for a word to 100k (was unlimited) and also don't search for the bounds of a wrapped line farther than they could possibly extend when a limit is present. This helps but does not completely fix some hangs when there is a very long line in a narrow window. Issue 5855.

Call refresh after changing font size to avoid doing a double redraw at two different scroll positions. Issue 5836

Scroll to the copy mode cursor when entering copy mode if it's going straight into selecting mode.

Also fix the menu opener to not select the last item.

Do not draw if the datasource width is negative. Tries to work around a crash pending the root cause's discovery.

Auto hide find cursor window when the session that created it ceases to be first responder. Issue 5637

OSC 8 ; url ST Anchor text OSC 8 ; ST

Add a new debug logging facility that synchronously writes messages to a log file and then at startup either deletes them or appends them to a new crash log.

Use ILog() to save such messages. ELog also saves them. XLog does not, but does log to the console. Old ELogs became XLog because I haven't audited them for privacy issues.

Tell the drawing helper that ligatures are enabled when a font has default ligatuers. Otherwise you get ligatures if an attributed string gets used for any reason. That user had switched to a font with non-default ligatures, turned off ligatures for the ascii font, and then switch to a font with default ligatures but the old setting persisted. Brought up in a comment by @hermo1 in issue 3569.

Add an advanced setting to exclude background colors from copied styles. Brought up by a comment in issue 3570.

When doCommandBySelector: is called in response to handling a key event, we may pass it off to the delegate. We used to use the app's current event but that could change to a non-keydown event, so save the keydown event in an ivar while handling the event.