<kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>=</kbd> on an en_US keyboard (recall that <kbd>Shift</kbd>+<kbd>=</kbd> generates a `+`) increases the zoom level as expected but now fails to suppress the `+` character. Steps to reproduce: 1. Use a standard en_US qwerty keyboard 2. Open xfce4-terminal version 0.9.1 3. Press <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>=</kbd> 4. Repeat step 3 until you get to the maximum zoom size 5. Repeat step 3 one more time Expected results: * The terminal zooms incrementally until hitting the max size * No keystrokes are sent to the shell or other application running in the terminal * Nothing happens on step 5 Actual results: * The terminal zooms incrementally until hitting the max size * One `+` is added for each zoom-in action triggered by this keyboard shortcut * Nothing happens on step 5 (not even errant `+` keystrokes) This is _not_ an issue with the newly-introduced keypad shortcut (<kbd>Ctrl</kbd>+<kbd>KP_Add</kbd>) from !26, and <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>KP_Add</kbd> does nothing (as expected). I'm using Debian Testing but I've pulled xfce4-terminal 0.9.1-1 from Experimental and launched it with `xfce4-terminal --disable-server`. Most of my system is still using older packages (the latest in Debian Testing), so this might be an artifact related to that. See also #55, #126, and !26.