optimize string_search when all columns = true

[jtorjo]

i should do a search on all the sub_string (line). If that returns any entries, just see that it fully matches a part

actually, this can be optimized quite a bit more - I can do the search directly on the large_string, and infer the lines containing the line from there (I would need to account for things such as case-sensitivity, case-insensitivity, and so on), but that is fine.

if I choose to go this route, I will have to think about it when I use several large string (when I will in fact allow for line_ex and such). So, I have to think of a general way to allow this.

another note: once I find results, i need to double check that the find is indeed correct (since it could be part of the line that is not included in search - such as level and such).

[jtorjo]

This is solved in 1.6.27. See function line.raw_full_msg() - which basically provides the whole message (containing all parts). Combined with the other caching mechanism, this provides close to 5x speed improvements. Pretty good for now