Pasting from T424592: [Share Highlights] Only show FAB when 2+ words are selected:

Checked on enwiki beta - the gif is below:

**//Note://**
There are plenty of cases where the rule - " Only show FAB when 2+ words are selected" is not followed, but for the first iteration of share highlight functionality the happy path for two-word only highlight limitation should suffice.

Cases where the two-word highlight rule might is "broken"

• when a picture is involved in highlighting:

(1) Only picture is selected

(2) one word from a heading and a picture are selected

(3) a picture and a word from caption is selected

Acceptance criteria

• don't show FAB in the edge cases above