Fix hovered links underline not showing when using cmd_or_ctrl for multi_cursor_modifier

[remixz]

I use cmd_or_ctrl for multi_cursor_modifier, but noticed that if I hovered a code reference while holding alt, it wouldn't show the underline. Instead, it would only show when pressing cmd. Looking at the code, it seems like this was just a small oversight on always checking for modifiers.secondary, instead of reading from the multi_cursor_modifier setting to determine which button was invoking link handling.

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Release Notes:

• Fixed underline when hovering a code link not showing when multi_cursor_modifier is cmd_or_ctrl