Fix missing documentation for many clock faces:

* Move from .c to .h as needed for consistency.
* When missing from both, copy from pull request or wiki.
* When missing entirely, infer functionality from source code.

movement/watch_faces/settings/set_time_hackwatch_face.c

@@ -21,21 +21,6 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
- * 
- * 
- * 
- * This is an extended version of set_time face which allow setting seconds precisely.
- * To achieve that - press and hold alarm button few seconds before 00 and release exaclty as reference clock turns 00.
- * All settings can go up, or down (long alarm press).
- * 
- * The challenge is that SensorWatch display is delayed 0.5 seconds vs hardware RTC clock. It is caused by interrupts being generated by raising
- * edge of counter. It means there is no way to precisely trigger at 0.5s, as events at different frequencies slightly mismatch. 
- * This watch face achieves this approximately by triggering at 15th out of 32Hz events.
- * 
- * If you are <30 seconds when setting seconds - you will stay in the same minute. Otherwise - you will go to next minute. 
- * 
- * Note that changing anything will slightly delay subseconds counter. This is why this face sets seconds last 
- * to achiveve best precision. Still, best possible precision is achieved with finetune face. 
  */
 
 #include <stdlib.h>