Adds /wi command to find wide strings ignoring case

So we have this command:

<pre><code>[0x00000000]> /w obsolete
hits: 0
[0x00000000]> /w Obsolete
hits: 1
0x00060261 hit1_0 4f00620073006f006c006500740065003e003e003e302130
[0x00000000]> /wi oBsoLetE
hits: 1
0x00060261 hit2_0 4f00620073006f006c006500740065003e003e003e302130
[0x00000000]>
</code></pre>