Blizzard Quote:
Zealot Upgrades
There are two upgrades possible at Twilight Council, one is researching ‘Charge’ for Zealots and the other is researching ‘Blink’ for Stalkers. Charge upgrade for Zealots includes movement speed increase of Zealots as well.  So to speak, Charge increases the movement speed of Zealots AND allows them to intercept nearby enemies.

Unit Selection of Burrowed Zerg
Let’s say you have Zerglings in one group and some of Zerglings in a group are burrowed and the others are not. You can switch your selection of Zerglings burrowed or unburrowed in a group by hitting Tab key and also UI color is different for the units of which the ability is on with some more darked green color.
And you can use Tab key as well for Siege Tank’s Siege Mode, Spine Crawler’s Root.

However, for unit’s cloaking ability like Ghost and Banshee, I couldn’t swith off the selection of Cloaked/Decloaked units in one group by Tab key.

And one more thing, when you double click on a unit, you can select all of the same units even though some of the same units’ ability is on and other’s off like Siege Mode or Cloak. But you can select only burrowed or rooted units by double clicking on burrowed or rooted units.

I will check this more with Development team and if I have additional information on this, I will share it with you.