Add type assertions for all searchable contexts

We want to add an additional method to ISearchableContext later in this branch,
and this will make sure that we don't forget to implement it in any concrete
context.

Author: stefanhaller

pkg/gui/context/commit_files_context.go

@@ -18,8 +18,9 @@ type CommitFilesContext struct {
 }
 
 var (
-	_ types.IListContext    = (*CommitFilesContext)(nil)
-	_ types.DiffableContext = (*CommitFilesContext)(nil)
+	_ types.IListContext       = (*CommitFilesContext)(nil)
+	_ types.DiffableContext    = (*CommitFilesContext)(nil)
+	_ types.ISearchableContext = (*CommitFilesContext)(nil)
 )
 
 func NewCommitFilesContext(c *ContextCommon) *CommitFilesContext {

pkg/gui/context/local_commits_context.go

@@ -18,8 +18,9 @@ type LocalCommitsContext struct {
 }
 
 var (
-	_ types.IListContext    = (*LocalCommitsContext)(nil)
-	_ types.DiffableContext = (*LocalCommitsContext)(nil)
+	_ types.IListContext       = (*LocalCommitsContext)(nil)
+	_ types.DiffableContext    = (*LocalCommitsContext)(nil)
+	_ types.ISearchableContext = (*LocalCommitsContext)(nil)
 )
 
 func NewLocalCommitsContext(c *ContextCommon) *LocalCommitsContext {

pkg/gui/context/patch_explorer_context.go

@@ -18,7 +18,10 @@ type PatchExplorerContext struct {
 	mutex                  *deadlock.Mutex
 }
 
-var _ types.IPatchExplorerContext = (*PatchExplorerContext)(nil)
+var (
+	_ types.IPatchExplorerContext = (*PatchExplorerContext)(nil)
+	_ types.ISearchableContext    = (*PatchExplorerContext)(nil)
+)
 
 func NewPatchExplorerContext(
 	view *gocui.View,

pkg/gui/context/sub_commits_context.go

@@ -21,8 +21,9 @@ type SubCommitsContext struct {
 }
 
 var (
-	_ types.IListContext    = (*SubCommitsContext)(nil)
-	_ types.DiffableContext = (*SubCommitsContext)(nil)
+	_ types.IListContext       = (*SubCommitsContext)(nil)
+	_ types.DiffableContext    = (*SubCommitsContext)(nil)
+	_ types.ISearchableContext = (*SubCommitsContext)(nil)
 )
 
 func NewSubCommitsContext(

pkg/gui/context/working_tree_context.go

@@ -15,7 +15,10 @@ type WorkingTreeContext struct {
 	*SearchTrait
 }
 
-var _ types.IListContext = (*WorkingTreeContext)(nil)
+var (
+	_ types.IListContext       = (*WorkingTreeContext)(nil)
+	_ types.ISearchableContext = (*WorkingTreeContext)(nil)
+)
 
 func NewWorkingTreeContext(c *ContextCommon) *WorkingTreeContext {
 	viewModel := filetree.NewFileTreeViewModel(