Decompose the showEditor_ function in FieldTextInput (#1285)
Decompose the showEditor_ function in FieldTextInput (#1285)

* Explicit annotations

* Decompose the showEditor_ function in FieldTextInput

* Remove extra newline

mark-friedman/blockly,nickmain/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,joshlory/blockly,trodi/blockly,picklesrus/blockly,nickmain/blockly,mark-friedman/blockly,joshlory/blockly,mark-friedman/blockly,groklearning/blockly,trinketapp/blockly,twodee/blockly,nickmain/blockly,twodee/blockly,trodi/blockly,jstnhuang/blockly,twodee/blockly,rachel-fenichel/blockly,twodee/blockly,jstnhuang/blockly,rachel-fenichel/blockly,mark-friedman/blockly,picklesrus/blockly,joshlory/blockly,jstnhuang/blockly,trinketapp/blockly,trodi/blockly,google/blockly,rachel-fenichel/blockly,google/blockly,trodi/blockly,google/blockly,mark-friedman/blockly,google/blockly,mark-friedman/blockly,groklearning/blockly,google/blockly,nickmain/blockly,google/blockly,google/blockly,twodee/blockly,twodee/blockly,rachel-fenichel/blockly,nickmain/blockly,groklearning/blockly,jstnhuang/blockly,trinketapp/blockly,groklearning/blockly,trinketapp/blockly,rachel-fenichel/blockly,picklesrus/blockly,nickmain/blockly