dictquicklookup(fix): use self.region for matching hold event

spec/unit/textboxwidget_spec.lua

@@ -0,0 +1,25 @@
+describe("TextBoxWidget module", function()
+    local TextBoxWidget, Font
+    setup(function()
+        require("commonrequire")
+        Font = require("ui/font")
+        TextBoxWidget = require("ui/widget/textboxwidget")
+    end)
+
+    it("should select the correct word on HoldWord event", function()
+        local tw = TextBoxWidget:new{
+            dimen = {x = 0, y = 0},
+            face = Font:getFace("cfont", 25),
+            text = 'YOOOOOOOOOOOOOOOO\nFoo.\nBar.',
+        }
+        tw:onHoldWord(function(w)
+            assert.is.same(w, 'YOOOOOOOOOOOOOOOO')
+        end, {pos={x=110,y=4}})
+        tw:onHoldWord(function(w)
+            assert.is.same(w, 'Foo')
+        end, {pos={x=0,y=50}})
+        tw:onHoldWord(function(w)
+            assert.is.same(w, 'Bar')
+        end, {pos={x=20,y=80}})
+    end)
+end)