Pin tooltip popups for keypress actions

[kazariad]

When hovering the mouse cursor over a code element, the resulting tooltip/popup is opened in a temporary window which closes automatically when the mouse cursor moves away from it. However, the behavior for popups activated via hotkey is inconsistent.

For example, the Quick Documentation action (Ctrl + Q) pins the tooltip and requires pressing Esc or clicking elsewhere to close (simply moving the mouse away isn't enough). But other actions, such as Error Description (Ctrl + F1), don't pin the popup window and function like the normal mouse hover. This patch changes the behavior of the following keypress actions to also pin their windows:

Next Highlighted Error (F2)
Previous Highlighted Error (Shift + F2)
Error Description (Ctrl + F1)
Hover Info

Before:

After:

[yopox]

Thank you! This looks great for consistency.