Git: Add "show all branches" option to log window

Seems most useful for file logs, but it can also help
the keep the overview of several work branches.

Change-Id: I7f794c6f7ed22351a5e0da5806fa3934cfa4bbff
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitclient.cpp

@@ -647,6 +647,11 @@ public:
     GitLogConfig(bool fileRelated, GitEditorWidget *editor)
         : GitBaseConfig(editor)
     {
+        QAction *allBranchesButton =
+            addToggleButton(QStringList{"--all"},
+                            Tr::tr("All"),
+                            Tr::tr("Show log for all local branches."));
+        mapSetting(allBranchesButton, &settings().allBranches);
         QAction *firstParentButton =
                 addToggleButton({"-m", "--first-parent"},
                                 Tr::tr("First Parent"),

src/plugins/git/gitsettings.cpp

@@ -113,6 +113,7 @@ GitSettings::GitSettings()
     colorLog.setSettingsKey("ColorLog");
     colorLog.setDefaultValue(true);
 
+    allBranches.setSettingsKey("AllBranches");
     firstParent.setSettingsKey("FirstParent");
 
     followRenames.setSettingsKey("FollowRenames");

src/plugins/git/gitsettings.h

@@ -33,6 +33,7 @@ public:
     Utils::FilePathAspect repositoryBrowserCmd{this};
     Utils::BoolAspect graphLog{this};
     Utils::BoolAspect colorLog{this};
+    Utils::BoolAspect allBranches{this};
     Utils::BoolAspect firstParent{this};
     Utils::BoolAspect followRenames{this};
     Utils::IntegerAspect lastResetIndex{this};