[Dilato]: [Core]: UI issue occurred when quick open the modal bar in a narrower code view mode.

[ZuoBaogang]

Problem: UI issue occurred when quick open the modal bar in a narrower code view mode.

Test device: Ubuntu 17.10, windows 7 (64 bit), Mac 10.12
Test build: 1.13.0.17679

Method:

1. Launch Brackets 1.13.
2. Drag the boundary of the file tree and code view to make the code view in a narrower mode.
3. Press ctrl+shift+O for win/linux and cmd+shift+O for mac.
4. Quick open modal bar will open. Observe the modal bar.
5. Enter a long network url and observe.

Result:
UI issue occurred when quick open the modal bar in a narrower code view mode.

Expected:
No UI issue .

mov:

image:

[ZuoBaogang]

This issue also exist in previous version.