It's the Keyboard Shortcuts and Launcher numbers, rather than the Dash,
that appears when tapping Super with Sticky Keys turned on. Tapping a
second time causes a switch to the Dash, with further presses toggling
between the two states.

While this might seem like acceptable behaviour, it's still problematic
for a couple of reasons.

Without Sticky Keys, a second Super press dismisses the Dash, but with
it turned on, the toggling behaviour kicks in, and then the Dash can
only be dismissed with Escape, which isn't the most intuitive
requirement.

Worse still, Escape only correctly dismisses the Dash. Press Escape
while the Shortcuts & Launcher numbers are displayed and the Shortcuts
list will go but the Launcher numbers remain (and won't work). To make
them go away, Super has to be pressed again and again until the Dash
appears, followed by Escape.

It would probably be better if the toggling were removed: first Super
press shows the Launcher and Shortcuts, second press switches to Dash,
third dismisses. Since the action cycle is triggered by the same key
it's easily discoverable, especially since the first press shows the
Shortcuts, which can describe the behaviour. The order also matches
their appearance in the Shortcuts list.

This requires the Sticky Keys status to be checked and two simple
changes to occur:

1) While the Dash is open, treat all Super presses like taps. This breaks the 
toggling and dismisses the Dash.
2) The Keyboard Shortcuts text should reflect actual behaviour:
"Super (Press)    Open Launcher, displays shortcuts." --> "Super (First Press)  
  Open Launcher, displays shortcuts."
"Super (Tap)    Open the Dash Home." --> "Super (Second Press)    Open the Dash 
Home."

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https://bugs.launchpad.net/bugs/911687

Title:
  Dash (Launcher) is not accessible when stricky keys is enabled.

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