Check all ascii characters when measuring font's baseline to avoid brackets and underscores falling too low.

This reverts commit 0a714f50.

Performance improvements for Find. Convert positions to x,y ranges in batches. Cache block position in findSubstring:stopAt.

Change how font sizes are estimated by looking at all upper case letters' estimates and the actual bounds of 'X' to determine the bounding box. Looks at 'x' and 'y' to determine real descender. Fixes bug 1108. Also mostly fixes Consolas (though its baseline is still one pixel too low).

Show menu bar before creating a normal window. This prevents the miniaturize button from being hidden. Fixes bug 1088.

optimize reverse search for long lines, which used to beachball. Fix crash when closing a window that is doing a search.

Change label of Closing Hotkey Window May Switch Spaces. Turn it on by default. Addresses comment in bug 823.

Add -shutdown to Popup and don't twiddle key status from within windowDidResignKey, which has crazy side effects. Fix bug where clicking on a background term while a popup is opened resulted in two key terms. Also fix a crash when quitting iTerm2 without confirmation while a popup is open. Fixes a crash when closing a term with cmd-opt-w while a popup is open.

Fix bug with appending an empty line after a partial line. It should add a blank line but it was a no-op. This made appendScreenToSCrollback push fewer lines than expected and popScrollbackLines would make a mess of things when called later. Also, empty lines would sometimes be missing from the scrollback buffer.

Don't try to resize terminated sessions and don't allow sessions smaller than 1x1. Fixes crash when closing a window in IR while another window exists and is key.

Don't honor pending closes while in IR because it may release a PseudoTerminal that's still in use in the call stack. Also check in DVRBuffer.h, missed in a recent commit.

Fix crash when you cmd-click in a window when there's no front text view (that happens after closing a window and another window doesn't become key because another app is key).