config: add 'hide-when-typing'

When enabled, the mouse cursor is hidden when the user types in the
terminal. It is un-hidden when the user moves the mouse, or when the
window loses keyboard focus.

extract.c

@@ -43,6 +43,7 @@ ensure_size(struct extraction_context *ctx, size_t additional_chars)
     assert(ctx->size >= ctx->idx + additional_chars);
     return true;
 }
+
 bool
 extract_finish(struct extraction_context *ctx, char **text, size_t *len)
 {