When viewing logs, add a way to highlight search results rather than filtering the list

When viewing logs, add a way to highlight entries rather than filter the list. This will make it much easier to find a commit in the list and examine it relative to other commits and branchs.

Benefits:

• You can easily locate a commit and see other changes that happened before and after it.
• You can more easily find two commits and examine the changes that occured between them.
• You can look at a commit and quickly determine where is lies within the history of the branch(s).