Extend halshow GUI

[hansu]

• Show command input field in both tabs
• Save command history and select previous by arrow-up-key
• Make BIT signals in watch-tab clickable (or ad a toggle button)

[hansu]

• update docs
• menu -> refresh list
• context menu for text view - add selected text to watch + add command addwatch signal --> add to watch in menu
• (translation)

[hansu]

Prio 1

• scale Tree view independently
• add warning in status are when pin is not found or already present on adding
• add pin by right click on pin name in text / add all pins in selection
• don't change scroll position on removing/unlinking
• add grip
• right click --> show in tree view

Other

• add all sub-pins to pane (only with message box)
• integrated help?
• Implement command completion (like https://wiki.tcl-lang.org/page/gush)
• optimization on resize if long watch list
• optimize save events
• update docs (-> command history)
• Save command history + search setting
• search regex/not regex, display checkboxes always