- Tabs should be expanded to spaces before being escaped with backslashes
- Do not double-escape with backslash and ^V. Prefer ^V.

This commit also fixes the tests by adding tab escapes where needed.

Move hotkey window to screen with cursor when it's not animated. Mentioned in a comment in issue 3683.

Prevent an exception when a tab view's image can't be constructed because it's 0x0. Seen in 3.1.beta.1, cause unknown

Ignore a paste escape sequence with an invalid base64 block. Caused a null pointer dereference. Issue 5578.

Get rid of cocoapods. Get rid of ocmockito. Get rid of ochamcrest. Now I understand the project again. Also, the tests now build.

Add a fake user defaults class to mock out the one thing that needs mocked.

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

For the modifier+number shortcuts to switch tab/window/pane, use virtual key codes instead of the event's characters or charactersIgnoringModifiers. For some keybord layouts like AZERTY you must hold down shift or capslock to enter a digit. The feature is inaccessable on such keyboards because we require the modifier mask be an exact match. This is guarded by an advanced setting since it could block user-defined shortcuts. Issue 5573.