layouts: Adjust layout-sizes to the correct aspect-ratios

and fix some other issues, to make the layouts more consistent.

The aspect-ratios of the layouts,
should now match the intended aspect-ratios (12:7 and 16:5),
with 3 decimal-digits of precision; either exactly,
or rounded to be a little more square,
so that the entire height of the panel will be used.
Adding 0.001 to `width` in the `default`-outlines of the layouts,
would make the layouts a little wider than the intended aspect-ratio.

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/691>

data/keyboards/cz+qwerty.yaml

@@ -1,13 +1,12 @@
 # Language: Czech (QWERTY)
 ---
 outlines:
-    default:       { width: 35.33, height: 52 }
-    change-view:   { width: 52.67, height: 52 }
-    change-view-2: { width: 35.33, height: 52 }
-    spaceline:     { width: 106,   height: 52 }
-    special:       { width: 35.33, height: 52 }
-    special-2:     { width: 52.67, height: 52 }
-    special-3:     { width: 52.67, height: 52 }
+    default:       { width: 35.657,  height: 52 }
+    change-view:   { width: 53.485,  height: 52 }
+    change-view-2: { width: 35.657,  height: 52 }
+    spaceline:     { width: 106.972, height: 52 }
+    special:       { width: 35.657,  height: 52 }
+    special-2:     { width: 53.485,  height: 52 }
 
 views:
     base:
@@ -33,12 +32,12 @@ views:
     accents:
         - "ä ě é ř ť ý ů í ó ö"
         - "á š ď ë ŕ ú ü ô ľ"
-        - "accents_show_upper ž ß č ç ñ ň ĺ BackSpace"
+        - "show_upper_accents_from_accents ž ß č ç ñ ň ĺ BackSpace"
         - "show_letters show_accents preferences space , . Return"
     upper_accents:
         - "Ä Ě É Ř Ť Ý Ů Í Ó Ö"
         - "Á Š Ď Ë Ŕ Ú Ü Ô Ľ"
-        - "accents_show_upper Ž ẞ Č Ç Ñ Ň Ĺ BackSpace"
+        - "show_upper_accents_from_accents Ž ẞ Č Ç Ñ Ň Ĺ BackSpace"
         - "show_letters show_upper_accents preferences space , . Return"
 
 buttons:
@@ -49,7 +48,7 @@ buttons:
                 unlock_view: "base"
         outline: "change-view"
         icon: "key-shift"
-    accents_show_upper:
+    show_upper_accents_from_accents:
         action:
             locking:
                 lock_view: "upper_accents"
@@ -97,6 +96,6 @@ buttons:
         outline: "spaceline"
         text: " "
     Return:
-        outline: "special-3"
+        outline: "special-2"
         icon: "key-enter"
         keysym: "Return"