Don't raise unsynced widgets.

[karliss]

Detailed description

Don't raise unsynced widgets when seeking.

Test plan (required)

• open two graph widgets
• switch to non memory widget like imports and strings
• select function to seek and observe that both graph widgets were raised
• unsync one of them
• switch to non memory widgets
• select function to seek and observe that only synced graph was raised

Closing issues

Closes #1455

[ITAYC0HEN]

The PR is good and does the job. However, I wonder... Wouldn't it be more efficient to disconnect unsynced widget (on context menu click) and connect it back on re-synced (context menu click)?

Syncing and unsyncing is something that rarely happens, while seeking is happening all the time

[karliss]

In theory yes, but I don't think it's currently worth the hassle until we have eliminated all other slowdowns while seeking. Unless we have hundreds of widgets the cost of doing almost nothing will be negligible compared to single widget actually refreshing something.

[ITAYC0HEN]

Np :)