[Segment] Inconsistent behavior when searching in Segments

Description

Precondition: Install Insight on QuickSilver

//Case1: Searching that character starting by /
1. Go to Insight >Segment.
2. Select the submenu Recent (in the left panel).
3. Input text to the search textbox that starts with a slash /. For example, /abc.

Expected:
Searching is executed.

Actual:
Searching isn't executed. And submenu All in the left panel is not selected.

//Case2: Searching that character starting isn't by /

1. Go to Insight >Segment,
2. Select the submenu Recent (in the left panel).
3. Input text to the search textbox that does not start with a slash . Ex: abc.

Expected:
Searching is executed. And the submenu All in the left panel is not selected.

Observed: Searching is executed. And the submenu All at left panel is selected.
(I'm not sure if we should selected submenu All at left panel.)