Toolbar vertical real-estate enhancement

A proposal for the toolbar to reclaim some unused screen real-estate.


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**Left aligned tool menu items:**
_Make the file and project toolbar buttons a single row that is capable of overflowing into a second row if needed._

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**Right aligned tool menu items:**
_Make the remaining components a single row that is capable of overflowing into a second row if needed._
1. All time-related items in a single row (BPM, time sig, clock)
2. Master volume/master pitch rotated horiz (single row height)
3. Optionally consolidate min/sec/millisec into a single "clock"
4. Visualization shorter (single row height)
5. CPU vertical, shorter (single row height)

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**File menu hidden**
_All menu items consolidated into a single quick-access menu. This is_ **no less clicks** _than the current menu and finds a better place for single-item menus such as LADSPA or Settings. Most items already have dedicated toolbar buttons, encourages their usage. Chrome menu button used only as example._

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**The big picture:**
_All changes combined into a single mock-up. Notice the master volume is frozen to the top right, for quick accessibility._

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**Additional Notes**

I would personally recommend removing the CPU and visualization from the default view and instead offer these as FX visualization plugins. Alternately, a basic CPU/MEM indicator might be a good alternative.

-Tres

The issue contains toolbar mockups and layout proposals but names no files, tests, or entry points. Start by identifying the existing toolbar implementation and current layout behavior; done would require an agreed scope and an implemented, tested version of the proposed changes.

Written by the indexing model from the issue text.