Making things easier

in usability tests with v0.047 some testers discribed the interface as "complicated", "confuse", "too much going on".
since there is no good application without its happy users, I went back to the drawing board and tried to clean things up:
- no colors, unless we need them
- no icons
- very reduced number table columns (each table should be customizable to make it more complex, if users desires so)** combine breadcrumps and options in the navigation header (this is weird, but I think it will work)
- on pages featuring only one table, don't to repeat the page-title as block-title (see task-list)
- filtering for lists (like trac)
- grouping of entries (like trac)