[Accessibility]: Present content first in References Treeview

CC @meganrogge @isidorn

1. Create `test.py` with the following content:

  ``` python
  x = 1
  x = 2
  x = 3
  ```

1. Locate your cursor at `x` and press Shift+F12.

## Current Output

> symbol in test.py on line 1 at column 1, x = 1

## Suggested Output

> x = 1 in test.py on line 1 at column 1

* Note: the word 'symbol' is not needed here.