localization: update German Translation (#2075)

* Use proper UTF-8 horizontal ellipsis char instead of triple dots
* Fix and improve various compound hyphenations
* Use proper en dash instead of minus char
* Replace straight quotes with typographic ones in non-technical friendly strings
* Reduce deviations from original texts (content and formatting)
* Remove indentations from multiline strings because they are visible in UI
* Fix typos and missing or superfluous punctuation marks
* Add missing translations and improve existing ones
* Further improve existing translations
* Improve keywords: translations for 'prune' and 'theirs' are now disambiguated and clearer
* Add new keys and translate their texts
* Mark German translation as complete and remove list of missing keys

Author: m2u-84

TRANSLATION.md

@@ -6,50 +6,7 @@ This document shows the translation status of each locale file in the repository
 
 ### ![en_US](https://img.shields.io/badge/en__US-%E2%88%9A-brightgreen)
 
-### ![de__DE](https://img.shields.io/badge/de__DE-96.11%25-yellow)
-
-<details>
-<summary>Missing keys in de_DE.axaml</summary>
-
-- Text.About.ReleaseDate
-- Text.Blame.IgnoreWhitespace
-- Text.BranchCM.CompareTwo
-- Text.BranchCM.CompareWith
-- Text.BranchCM.CompareWithHead
-- Text.ChangeCM.Merge
-- Text.ChangeCM.MergeExternal
-- Text.Checkout.WarnUpdatingSubmodules
-- Text.Compare.WithHead
-- Text.Configure.Git.AskBeforeAutoUpdatingSubmodules
-- Text.MergeConflictEditor.AcceptBoth.MineFirst
-- Text.MergeConflictEditor.AcceptBoth.TheirsFirst
-- Text.MergeConflictEditor.UseBoth
-- Text.MergeConflictEditor.AllResolved
-- Text.MergeConflictEditor.ConflictsRemaining
-- Text.MergeConflictEditor.Mine
-- Text.MergeConflictEditor.NextConflict
-- Text.MergeConflictEditor.PrevConflict
-- Text.MergeConflictEditor.Result
-- Text.MergeConflictEditor.SaveAndStage
-- Text.MergeConflictEditor.Theirs
-- Text.MergeConflictEditor.Title
-- Text.MergeConflictEditor.UnsavedChanges
-- Text.MergeConflictEditor.UseMine
-- Text.MergeConflictEditor.UseMine.Tip
-- Text.MergeConflictEditor.UseTheirs
-- Text.MergeConflictEditor.UseTheirs.Tip
-- Text.MergeConflictEditor.Undo
-- Text.No
-- Text.Repository.OpenAsFolder
-- Text.Repository.Resolve
-- Text.TagCM.CompareTwo
-- Text.TagCM.CompareWith
-- Text.TagCM.CompareWithHead
-- Text.WorkingCopy.Conflicts.Merge
-- Text.WorkingCopy.Conflicts.MergeExternal
-- Text.Yes
-
-</details>
+### ![de__DE](https://img.shields.io/badge/de__DE-%E2%88%9A-brightgreen)
 
 ### ![es__ES](https://img.shields.io/badge/es__ES-%E2%88%9A-brightgreen)
 
@@ -1543,4 +1500,4 @@ This document shows the translation status of each locale file in the repository
 - Text.MergeConflictEditor.UseMine.Tip
 - Text.MergeConflictEditor.UseTheirs.Tip
 
-</details>
+</details>