message: glterm: resize terminal on window resize.
diff: // TODOs:
  // - [x] proper glterm termination (window close as well as process exit)
  +// - [x] Fix window-resize: call Screen::resize(), PseudoTerminal::updateWindowSize()
  // - [ ] other SGRs (bold, italic, etc)
  // - [ ] fix text positioning (chars seem pressed down instead of centered)
  -// - [ ] Fix window-resize: call Screen::resize(), PseudoTerminal::updateWindowSize()
  // - [ ] font loading on Linux
  // - [ ] input: F13..F25
  // - [ ] input: GLFW_KEY_PRINT_SCREEN
  @@ -239,6 +239,8 @@ void GLTerm::onResize(unsigned _width, unsigned _height)
  textShaper_.maxAdvance(), textShaper_.lineHeight()
  );
  + terminal_.resize(winSize);
  +
  cellBackground_.onResize(_width, _height);
  textShaper_.shader().use();
  