Added new option to find panel of space text which toggles case-esensitive search. Additional changes: - Send NC_TEXT|NA_EDITED when removing markers in find_and_replace modifier this prevents "sticked" markers which disappears on first redraw when search text wasn't found - Do not show "Text wasn't found" error when text to be searched is contained in the end of buffer and it's selected. Replacing/marking used to happen, but this popup message was really annoying for this case. TODO: It's incorrect to use UI_GetThemeColor4ubv from this operator